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迈威生物(688062):BD落地优化现金流,ADC+TCE平台产品出海可期
China Post Securities· 2025-07-30 12:50
Investment Rating - The report gives a "Buy" rating for the company, indicating an expected relative increase in stock price of over 20% compared to the benchmark index within six months [7][11]. Core Insights - The company is experiencing rapid commercialization and is continuously enhancing its R&D pipeline, with a projected revenue of 200 million yuan in 2024, representing a growth of 56.28% [3][9]. - The company has successfully established business development (BD) deals that optimize cash flow, with two recent agreements totaling over 4.7 billion yuan, which will significantly support future R&D efforts [4][5]. - The company has a differentiated portfolio of ADC and TCE products, with significant potential in its lead candidate ST2 monoclonal antibody for COPD, which is expected to yield promising clinical data in 2025 [5][6]. Company Overview - The latest closing price of the company's stock is 34.90 yuan, with a total market capitalization of 13.9 billion yuan [2]. - The company has a total share capital of 400 million shares, with 204 million shares in circulation [2]. - The company has a debt-to-asset ratio of 63.6% and a negative price-to-earnings ratio of -13.37, indicating current financial challenges [2]. Financial Projections - The company is expected to achieve revenues of 800 million yuan in 2025, 1.55 billion yuan in 2026, and 2.08 billion yuan in 2027, with significant growth rates projected [9][10]. - The net profit attributable to the parent company is forecasted to improve from -600 million yuan in 2025 to breakeven in 2027 [9][10]. - The EBITDA is expected to turn positive by 2026, indicating a potential turnaround in operational performance [9][10].
国防军工行业报告:美军17年来首次在英国本土部署核武器,泰国与柬埔寨边境地区交火持续
China Post Securities· 2025-07-30 07:28
Industry Investment Rating - The industry investment rating is "Outperform the Market" and is maintained [1] Core Viewpoints - The report highlights the first deployment of US nuclear weapons in the UK in 17 years, with the B61-12 thermonuclear gravity bombs being stationed at RAF Lakenheath, enhancing NATO's tactical nuclear capabilities [4][13] - Ongoing conflicts between Thailand and Cambodia have resulted in military engagements, indicating potential geopolitical risks that may affect defense spending and military operations in the region [5][16] - Looking ahead to 2025, the military industry is expected to see a turning point in orders, driven by new technologies and products aimed at improving equipment performance and reducing costs [6][17] Summary by Sections 1. Investment Highlights - The report suggests focusing on two main investment themes: aerospace and "gap-filling" new priorities, including companies like Fihua, Fenghuo Electronics, and others [6][17] - The second theme involves new technologies, products, and market directions with greater elasticity, featuring companies such as Aerospace Intelligence and Guangdong Hongda [6][17] 2. Market Overview - The China Securities Military Industry Index rose by 1.51%, while the Shenwan Military Industry Index increased by 1.28%, indicating a positive trend in the military sector compared to broader market indices [18] - The top ten performing stocks in the military sector included Xinguang Optoelectronics (+32.55%) and Boyun New Materials (+25.16%), showcasing significant gains [19][20] 3. Valuation Levels - As of July 25, 2025, the China Securities Military Industry Index stood at 11,987.24, with a PE-TTM valuation of 118.72 and a PB valuation of 3.70, indicating a relatively high valuation compared to historical levels [21][24] - The report provides detailed valuation percentiles for various military companies, highlighting significant differences in market performance [24] 4. Data Tracking - The report tracks recent capital increases and stock incentive plans among military companies, indicating ongoing financial activities that may impact stock performance [27][29] - It also notes significant orders in the low-altitude economy sector, with a $1.75 billion order for eVTOL aircraft, reflecting growth opportunities in emerging markets [31][32]
江河集团(601886):发布三年高分红规划,海外订单高增驱动成长
China Post Securities· 2025-07-30 07:17
Investment Rating - The report assigns a "Buy" rating for Jianghe Group, expecting the stock to outperform the benchmark index by more than 20% within the next six months [2][13]. Core Insights - Jianghe Group has announced a three-year high dividend plan, committing to distribute at least 80% of the annual net profit attributable to shareholders or a minimum of CNY 0.45 per share (including tax), whichever is higher, for the years 2025-2027 [5][6]. - The company reported a strong cash flow performance, with operating cash flow of CNY 1.63 billion in 2024, supporting its high dividend payout [6]. - The company has seen a 6.3% year-on-year increase in new orders, totaling CNY 13.69 billion in the first half of 2025, driven by robust demand for curtain walls and photovoltaic buildings, particularly from overseas markets [6][7]. Financial Performance and Forecast - Revenue projections for Jianghe Group are CNY 24.2 billion in 2025 and CNY 26.2 billion in 2026, reflecting year-on-year growth rates of 8.1% and 8.0%, respectively [7][9]. - The net profit attributable to shareholders is expected to reach CNY 6.86 billion in 2025 and CNY 7.57 billion in 2026, with growth rates of 7.7% and 10.2% [7][9]. - The company's PE ratios for 2025 and 2026 are projected to be 12.2X and 11.0X, respectively, indicating a favorable valuation [7][9]. Market Position and Strategy - Jianghe Group is expanding its overseas business, establishing a dedicated overseas division and targeting markets in the Middle East and Southeast Asia, which is expected to drive significant growth in new orders [6][7]. - The company has a strong market position in the curtain wall segment, benefiting from increased market share due to its comprehensive advantages [6][7].
统联精密(688210):统合精工,联动智造
China Post Securities· 2025-07-30 05:23
Investment Rating - The report assigns a "Buy" rating for Tonglian Precision (688210) with a first coverage [1]. Core Views - The rapid evolution of generative AI technology is driving a new wave of hardware innovation in consumer electronics and smart devices. This includes advancements in foldable smartphones, AI personal computers, smart glasses, and wearable devices, which enhance user experience and stimulate consumer demand [4]. - The company is expanding its precision manufacturing capabilities to meet the demand for lightweight and high-performance components, utilizing new materials and technologies such as 3D printing. This positions the company favorably in the market for new smart terminal products [5]. - The company plans to issue convertible bonds to raise up to 595 million yuan, primarily for a new intelligent manufacturing center focused on lightweight materials, which will enhance its role from a traditional component supplier to a comprehensive technology service provider [6]. Financial Projections - Revenue projections for the company are 1.12 billion yuan in 2025, 1.52 billion yuan in 2026, and 2.10 billion yuan in 2027, with net profits of 101.11 million yuan, 193.90 million yuan, and 329.62 million yuan respectively [7][10]. - The company is expected to achieve a revenue growth rate of 44.93% in 2024, followed by 37.62% in 2025, 35.80% in 2026, and 38.30% in 2027 [10][11].
瑞芯微(603893):首发端侧协处理器,助力AIOT2.0时代
China Post Securities· 2025-07-29 10:50
Investment Rating - The investment rating for the company is "Buy" and is maintained [2] Core Views - The company has launched its first edge AI co-processor, RK1820/RK1828, designed for edge AI applications, featuring high computing power and bandwidth [5][6] - The AIoT industry is transitioning from version 1.0 to 2.0, benefiting from the emergence of large models and significant intellectual resources [6] - The RK1820 co-processor integrates high-bandwidth on-chip DRAM and multi-core NPU, supporting mainstream model frameworks and providing a universal API for easy development [6] - The company is expanding its automotive electronics segment with the RK-M series automotive-grade SoCs, covering various applications in intelligent vehicles [7] Financial Projections - The projected revenues for the company are 4.35 billion, 5.54 billion, and 6.89 billion yuan for the years 2025, 2026, and 2027 respectively, with net profits of 1.08 billion, 1.41 billion, and 1.79 billion yuan for the same years [7] - The revenue growth rates are expected to be 38.52%, 27.43%, and 24.52% for the years 2025, 2026, and 2027 respectively [10] - The earnings per share (EPS) are projected to be 2.57, 3.34, and 4.26 yuan for the years 2025, 2026, and 2027 respectively [10] Company Overview - The latest closing price of the company's stock is 162.83 yuan, with a total market capitalization of 68.5 billion yuan [4] - The company has a debt-to-asset ratio of 16.9% and a price-to-earnings (P/E) ratio of 114.67 [4]
海外宏观周报:美股业绩表现亮眼-20250729
China Post Securities· 2025-07-29 07:51
Group 1: Macro Economic Insights - As of July 28, 32% of S&P 500 companies have reported Q2 earnings, with 77% exceeding expectations, up from 73% last year[1] - 62% of companies reported both revenue and net profit exceeding expectations, compared to 48% last year[1] - Q2 revenue growth rate was 5.0% year-on-year, while net profit growth rate was 5.5%, better than last year's 3.1% for non-financial companies[1] Group 2: Market Recommendations - It is suggested to buy on dips in the U.S. stock market, as historical trends show seasonal weakness from September to November[2] - The high yield of 10-year U.S. Treasury bonds may lead to a potential pullback in Q3, but a weaker dollar could enhance S&P 500 earnings[2] Group 3: Risks and Economic Data - Risks include trade negotiations falling short of expectations and escalating tariff conflicts[3] - U.S. existing home sales slightly declined to 3.93 million units in June, falling below the 4 million mark[8] - Initial jobless claims show a slow decline, while continuing claims remain high, indicating increased difficulty in the job market[8]
金工周报-20250729
China Post Securities· 2025-07-29 07:29
- NVIDIA launched the OpenReasoning-Nemotron reasoning model series in July 2025, based on the Qwen2.5 architecture, distilled from the 671 billion-parameter DeepSeek R1 0528 model, and available in four parameter scales: 1.5B, 7B, 14B, and 32B. The model aims to support structured tasks such as mathematics, science, and code generation efficiently [12] - The core innovation of OpenReasoning-Nemotron lies in its data distillation strategy, leveraging the NeMo Skills framework to generate 5 million high-quality data trajectories covering mathematical proofs, scientific derivations, and programming solutions. The training process uses supervised fine-tuning (SFT) instead of reinforcement learning, ensuring logical consistency and precision in symbolic reasoning [12] - The model employs the GenSelect algorithm to implement a "heavy reasoning mode," which involves parallel generation of candidate solutions by multiple agents and selecting the optimal answer. For example, the GenSelect@64 on the 32B model improved HMMT math competition scores from 73.8 to 96.7 and enhanced LiveCodeBench scores from 70.2 to 75.3 in code generation tasks [13] - The OpenReasoning-Nemotron series achieved record-breaking results in benchmarks such as GPQA, MMLU-PRO, and AIME24. The 32B model scored 89.2 on AIME24, surpassing OpenAI's o3-high model, while the 7B model scored 78.2, representing a nearly 20% improvement over its predecessor. However, the 1.5B model showed performance degradation to 45.6 due to inconsistencies in handling 32K tokens [15] - The Qwen3-Coder model, developed by Alibaba Cloud's Tongyi Qianwen team, was officially open-sourced in July 2025. It features a 480 billion parameter scale with a native 256K context window and employs a sparse MoE design, activating only 35 billion parameters per inference. The model was trained on a 7.5 trillion token corpus, with 70% of the data being code, covering over 80 programming languages and 20 markup languages [19][20] - Qwen3-Coder achieved a HumanEval pass@1 accuracy of 93.7%, surpassing Claude 3.5's 92.4%. On the SWE-Bench Verified benchmark, it achieved a 31.4% task success rate, exceeding GPT-4's 30.9%. Key innovations include extending the native 256K context to 1M tokens using YaRN technology and integrating execution feedback mechanisms to validate and reward generated code [20] - The GitLab Duo platform, launched in public beta in July 2025, virtualizes traditional software development team roles into specialized AI agent clusters. These agents handle tasks such as requirement planning, code writing, security analysis, testing, and operations management, forming a dynamic collaboration network. The platform automates workflows through the "Flows" feature, enabling developers to input functional descriptions and have agents complete tasks like requirement decomposition, code generation, and testing [33][36] - GitLab Duo integrates with mainstream development environments like VS Code and JetBrains IDEs and plans to introduce a "knowledge graph" feature to enhance agents' understanding of code context. The platform also emphasizes security, employing end-to-end encryption and sandbox environments for code validation [36][37]
信用周报:急跌后信用左侧窗口打开?-20250729
China Post Securities· 2025-07-29 07:03
Group 1: Investment Rating - There is no information about the industry investment rating provided in the report. Group 2: Core Views - Last week, the bond market adjusted continuously. Credit bonds experienced an unexpected "steep decline" with larger drops than interest - rate bonds. Affected by the "anti - involution" sentiment, the equity and commodity markets strengthened, causing the bond market to weaken due to the "see - saw" effect. Tightening liquidity in the second half of the week and strong profit - taking in funds and wealth management also contributed to the decline. The central bank's liquidity support on Friday stabilized the bond market temporarily [2][11]. - The adjustment of ultra - long - term credit bonds exceeded that of interest - rate bonds of the same maturity, with the highest adjustment in perpetual and secondary capital (perpetual and Tier 2, "Perp & T2") ultra - long bonds. The yields of AAA/AA + 10Y medium - term notes, AAA/AA + 10Y urban investment bonds, and AAA - 10Y bank Tier 2 capital bonds all increased significantly [3][12]. - The Perp & T2 bond market weakened and showed a "volatility amplifier" characteristic, with the declines of 3Y and above maturities exceeding those of general credit and ultra - long - term credit bonds of the same maturities. The trading sentiment was weak throughout the week, only easing on Friday [4][17]. - The selling intention of ultra - long - term credit bonds was strong, while the buying intention was weak. High - activity trading was mainly concentrated in 3 - 5Y low - quality urban investment bonds and some short - term real estate and financial bonds with flaws [5][22]. - Public funds continued to reduce their credit bond holdings, especially for bonds with maturities over 5 years. However, the turnover rate of 3 - 5Y Perp & T2 bonds increased significantly, indicating a shift to more liquid varieties. The trading value of credit - market - making ETFs decreased by nearly 4 billion, and the growth rate of the trading value of sci - tech innovation bond ETFs slowed down [5][27]. - In the short term, liquidity is still the key strategy. After the steep decline, 3 - 5Y bank Tier 2 capital bonds present certain investment opportunities, and there are also good opportunities for 1 - 3Y low - quality urban investment bond sinking and riding strategies. It is recommended to wait for better entry points for ultra - long - term bonds [5][27]. Group 3: Summary by Directory 1. Bond Market Adjustment and Performance - From July 21 to July 25, 2025, the yields of 1Y - 5Y treasury bonds increased by 3.5BP, 5.5BP, 7.3BP, 7.9BP, and 7.9BP respectively, while the yields of the same - maturity AAA and AA + medium - term notes increased more significantly [11]. - The yields of 10Y AAA/AA + medium - term notes, AAA/AA + urban investment bonds, and AAA - 10Y bank Tier 2 capital bonds increased by 11.99BP, 9.99BP, 11.14BP, 10.14BP, and 14.47BP respectively, while the 10Y treasury bond yield only increased by 6.72BP [3][12]. 2. Curve Shape and Credit Spread Analysis - The steepness of the 1 - 2Y all - grade and 2 - 3Y low - grade curves was the highest, and the steepness was basically the same as that at the end of May. Except for the relatively flat short - end (less than 1 year), the rest of the maturities were at the highest steepness since the current bull market [14]. - The 3Y - 5Y credit spread protection cushion has been strengthened. The yields of 1Y - AAA, 3Y - AAA, 5Y - AAA, 1Y - AA +, 3Y - AA +, 5Y - AA +, 1Y - AA, and 3Y - AA medium - term notes were at the 19.89%, 26.02%, 25.25%, 12.75%, 15.05%, 18.62%, 13.77%, and 17.85% levels since 2024 respectively. The historical quantiles of their credit spreads were 11.14%, 24.66%, 28.64%, 6.89%, 13.52%, 21.48%, 7.69%, and 26.79% respectively [16]. 3. Perp & T2 Bond Market Analysis - The Perp & T2 bond market weakened, and the declines of 3Y and above maturities exceeded those of general credit and ultra - long - term credit bonds of the same maturities. The 1 - 5Y, 7Y, and 10Y AAA - bank Tier 2 capital bond yields increased by 6.73BP, 11.11BP, 13.80BP, 15.27BP, 13.67BP, 14.21BP, and 14.47BP respectively [4][17]. - The trading sentiment was weak throughout the week, only easing on Friday. From July 21 to July 25, the low - valuation trading ratios of Perp & T2 bonds were 4.88%, 7.32%, 0.00%, 0.00%, and 100.00% respectively, and the average trading durations were 0.77 years, 0.63 years, 0.53 years, 0.50 years, and 4.05 years respectively [4][19]. 4. Ultra - long - term Credit Bond Market Analysis - The selling intention of ultra - long - term credit bonds was strong, and the discount trading ratios from July 21 to July 25 were 92.68%, 60.98%, 90.24%, 97.56%, and 65.85% respectively. The discount amplitude was also significant, with some trading at over 5BP [5][22]. - The buying intention of ultra - long - term credit bonds was weak. The low - valuation trading ratios from July 21 to July 25 were 29.27%, 4.88%, 2.44%, 2.44%, and 4.88% respectively, and most of the low - valuation trading amplitudes were within 2BP [5][23]. 5. Institutional Behavior and ETF Analysis - Public funds continued to reduce their credit bond holdings, especially for bonds with maturities over 5 years. However, the turnover rate of 3 - 5Y Perp & T2 bonds increased significantly, indicating a shift to more liquid varieties [5][27]. - Affected by the market adjustment, the trading value of credit - market - making ETFs decreased by nearly 4 billion in a week, and the growth rate of the trading value of sci - tech innovation bond ETFs slowed down, with the subsequent increase in ETFs possibly falling short of expectations [5][27].
高频数据跟踪:焦煤螺纹钢价格上涨,BDI持续快速上行
China Post Securities· 2025-07-29 03:28
1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoints of the Report - High - frequency economic data shows production end heat differentiation, with the steel industry chain recovering while asphalt, PX, and tire operating rates decreasing. The real - estate market is marginally improving, with increases in both commercial housing and land transaction areas. Price trends are also differentiated, with crude oil falling, coking coal rising significantly by 32.6%, rebar prices increasing, and non - ferrous metals remaining stable. Among agricultural products, pork, eggs, and vegetables are rising, with eggs having a large increase. Shipping index trends continue to diverge, with domestic SCFI and CCFI falling and BDI continuing to rebound sharply. Short - term focus should be on the implementation of new round of stable growth stimulus policies, the recovery of the real - estate market, and the impact of international geopolitical changes [2][33]. 3. Summary by Relevant Catalog 3.1 Production: Steel Industry Chain Recovers, Asphalt, PX, Tire Operating Rates Decrease - In the week of July 25, the coke oven capacity utilization rate increased by 0.71 pct, blast furnace operating rate remained flat, and rebar production increased by 2.9 tons. Meanwhile, the petroleum asphalt operating rate decreased by 4.0 pct, chemical PX operating rate decreased by 0.81 pct, PTA remained flat, and the operating rates of automobile all - steel tires and semi - steel tires decreased by 0.08 pct and 0.12 pct respectively [3][9][10]. 3.2 Demand: Real - Estate Market Marginally Rebounds, BDI Continues to Rebound Rapidly - In the week of July 20, the commercial housing transaction area rebounded, the inventory - to - sales ratio increased, land transaction area rebounded, and the residential land transaction premium rate increased. Movie box office increased by 215 million yuan compared with the previous week, and automobile manufacturers' daily average retail and wholesale sales increased by 11,000 and 12,000 vehicles respectively. In the week of July 25, the shipping index SCFI fell by 3.3%, CCFI fell by 3.24%, and BDI continued to rebound significantly by 9.9% [3][15][21]. 3.3 Price: Crude Oil Falls, Coking Coal and Rebar Rise Significantly, Non - Ferrous Metals Remain Stable - In the week of July 25, Brent crude oil price fell by 1.21% to $68.44 per barrel, coking coal futures price rose by 32.6% to 1,236.5 yuan per ton. LME copper, aluminum, and zinc futures prices changed by +0.02%, - 0.27%, and +0.18% respectively, and domestic rebar futures price rose by 5.07%. The overall price of agricultural products slightly decreased but remained in a seasonal upward trend, with pork, eggs, vegetables, and fruits changing by +1.02%, +6.83%, +1.15%, and - 1.24% respectively compared with the previous week [3][23][26]. 3.4 Logistics: Subway Passenger Volume and Flight Volume Decrease, Peak Congestion Index in First - Tier Cities Continues to Fall - In the week of July 25, subway passenger volumes in Beijing and Shanghai decreased, domestic and international flight volumes decreased, and the peak congestion index in first - tier cities continued to fall [4][29][30]. 3.5 Summary: Coking Coal and Rebar Prices Rise, BDI Continues to Rebound Rapidly - High - frequency economic data shows production end heat differentiation, real - estate market marginal improvement, price trend differentiation, and shipping index trend divergence. Short - term focus should be on new policies, real - estate market recovery, and geopolitical changes [33].
流动性打分周报:中长久期中高评级城投债流动性下降-20250729
China Post Securities· 2025-07-29 02:38
1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoints of the Report - This weekly report tracks the liquidity scores of individual bonds in different bond sectors based on the bond asset liquidity scores of qb. The liquidity of medium - to long - term, medium - to high - rated urban investment bonds has decreased, while the liquidity of medium - to long - term industrial bonds has increased [1]. 3. Summary by Relevant Catalogs 3.1 Urban Investment Bonds: Decreased Liquidity of Medium - to Long - Term, Medium - to High - Rated Bond Items - **Quantity Changes**: The number of high - grade, high - liquidity urban investment bonds with medium - to long - terms and medium - to high - ratings has decreased. Regionally, the number of high - grade, high - liquidity bond items has increased in Shandong and Sichuan, remained stable in Chongqing, and decreased in Jiangsu and Tianjin. In terms of maturity, the number of high - grade, high - liquidity bond items has remained stable for those within 1 year and over 5 years, but decreased for those in the 1 - 2 - year, 2 - 3 - year, and 3 - 5 - year ranges. In terms of implicit ratings, the number of high - grade, high - liquidity bond items with implicit ratings of AAA, AA+, AA, AA(2), and AA - has all decreased, with a larger decrease in medium - to high - rated bonds [1][7]. - **Yield Changes**: Regionally, the yields of high - grade, high - liquidity urban investment bonds in Jiangsu, Shandong, Sichuan, Tianjin, and Chongqing have mainly increased, with the increase ranging from 5 - 15bp. In terms of maturity and implicit ratings, the yields of high - grade, high - liquidity urban investment bonds have mainly increased, with the increase ranging from 8 - 12bp [8]. - **Top 20 in Liquidity Score Increase**: The main body level is mainly AA, concentrated in regions such as Jiangsu, Zhejiang, Sichuan, Anhui, and Hunan, and the industries mainly involve construction decoration, transportation, and comprehensive industries [10]. - **Top 20 in Liquidity Score Decrease**: The main body level is mainly AA, with regional distribution mainly in Jiangsu, Zhejiang, Hunan, Fujian, and Shanghai, and the industries are mainly construction decoration, real estate, and comprehensive industries [10]. 3.2 Industrial Bonds: Increased Liquidity of Medium - to Long - Term Bond Items - **Quantity Changes**: The number of high - grade, high - liquidity industrial bonds with medium - to long - terms has increased. By industry, the number of high - grade, high - liquidity bond items has increased in the public utilities and steel industries, and decreased in the real estate, transportation, and coal industries. In terms of maturity, the number of high - grade, high - liquidity bond items has increased for those in the 2 - 3 - year, 3 - 5 - year, and over 5 - year ranges, remained stable for those in the 1 - 2 - year range, and decreased for those within 1 year. In terms of implicit ratings, the number of high - grade, high - liquidity bond items with implicit ratings of AAA, AAA -, and AA+ has increased, while the number with implicit ratings of AAA+ and AA - has decreased [2][16]. - **Yield Changes**: By industry, the yields of high - grade, high - liquidity bonds in the public utilities, transportation, coal, and steel industries have mainly increased, with the increase ranging from 8 - 15bp. The yields of bond items with a liquidity level of B in the real estate industry have decreased, with a decrease of about 12bp. In terms of maturity, the yields of high - grade, high - liquidity bonds at all maturities have mainly increased, with the increase ranging from 10 - 14bp. In terms of implicit ratings, the yields of high - grade, high - liquidity bond items at all implicit ratings have mainly increased, with the increase ranging from 8 - 10bp [17]. - **Top 20 in Liquidity Score Increase**: The industries of the top 20 main bodies in liquidity score increase are mainly commerce and retail, real estate, and power equipment, and the main body levels are mainly AAA and AA+. The industries of the top 20 bonds are mainly transportation, public utilities, and real estate [18]. - **Top 20 in Liquidity Score Decrease**: The top 20 main bodies in liquidity score decrease are mainly in the construction decoration, real estate, and transportation industries, and the main body levels are mainly AAA and AA. The industries of the top 20 bonds are mainly transportation, public utilities, and coal [18].