Group 1: Market Data Coverage and Update Speed - Sina Finance covers over 40 markets including A-shares, Hong Kong stocks, US stocks, futures, and foreign exchange, connecting to over 80 global exchanges with millisecond-level update speed [2] - Tencent Self-Selected Stocks provides real-time market coverage for Shanghai, Shenzhen, Hong Kong, and US stock markets, but lacks comprehensive coverage for futures and foreign exchange [2] - Futu NiuNiu offers in-depth market data for Hong Kong, US, and A-shares, with a transaction system that completes orders in just 0.0037 seconds [2] - Dongfang Caifu focuses mainly on stock market data, with limited futures and foreign exchange coverage, and experiences a 1-2 second delay in oil price quotes [2] Group 2: News and Information Services - Sina Finance aggregates content from over a hundred authoritative media sources and has a professional editorial team, providing timely interpretations of major events 5-10 seconds ahead of competitors [3] - Tencent Self-Selected Stocks pushes global financial news 24/7 but lacks depth in original content and analysis [3] - Futu NiuNiu updates global business and financial news continuously, but its authority and timeliness are slightly lower than that of Sina Finance [3] - Dongfang Caifu's community generates a high volume of posts, but the quality of information varies, and its international event interpretations often lack originality [3] Group 3: Intelligent Tools and Features - Sina Finance's "Xina AI Assistant" revolutionizes data monitoring and strategy generation, marking risk and opportunity points in financial reports [4][5] - Futu NiuNiu provides various big data applications, including sentiment indices and stock selection tools, to help investors manage risks and enhance profitability [4] - Dongfang Caifu offers a "conditional order" feature with 23 trigger logics, but its algorithmic trading module requires a paid subscription [5] Group 4: Community Interaction and Quality - Sina Finance integrates insights from influential financial figures and maintains a high-quality community with 82% certified analysts, filtering out noise effectively [6] - Futu NiuNiu's community allows for knowledge exchange and interaction among investors, fostering a positive atmosphere [6] - Dongfang Caifu's "stock bar" community has a high daily post volume but suffers from misinformation and emotional content, requiring users to discern quality [6] Group 5: Overall Assessment - Sina Finance excels in market data coverage, authoritative news, practical intelligent tools, and professional community interaction, making it suitable for investors needing in-depth analysis and global market insights [7] - Tencent Self-Selected Stocks is user-friendly and ideal for beginners and social investors [7] - Futu NiuNiu is advantageous for trading in Hong Kong and US markets, appealing to overseas investors [7] - Dongfang Caifu is a strong choice for novice investors and fund enthusiasts due to its robust community and fund services [7]