2021年国务院办公厅印发《关于加快发展保障性租赁住房的意见》，首次从国家层面明确允许将闲置商业办公、旅馆、厂房等非居住存量房屋改建为保障 性租赁住房，且不改土地性质、不补缴土地价款，配套税收减免、民用水电气价格等政策红利，为全国商改保推进按下了启动键。 作为全国人口净流入最多、住房供需矛盾最突出的三大超一线城市，"北上深"成为"商改保"推进的核心阵地。 一边是商办市场持续承压的冰冷数据：2025年一季度，北京甲级写字楼平均有效租金跌至246元/平方米/月，逼近2011年历史低位，空置率维持在17.9%的 高位；2025年三季度，上海甲级写字楼空置率攀升至21.4%，租金已连续14个季度下降，老旧办公楼空置率甚至超过30%；同期深圳甲级写字楼空置率约 29.0%，稳居四大一线城市首位，租金较2022年峰值累计降幅达22%。 另一边则是保租房供给的巨大缺口：北京"十四五"规划明确新增40万套保租房目标，深圳计划"十四五"建设筹集不少于74万套，上海截至2025年末已累计 筹措保租房60万套（间），但核心城区供需缺口依然显著。 正是在这样的供需错配之下，"北上深"的"商改保"迎来了全面提速的发展新阶段。 政策筑底 ...

Investment Rating - The report does not provide a specific investment rating for the real estate industry, indicating a neutral stance on the sector's performance relative to the Shanghai and Shenzhen 300 Index [9]. Core Insights - The report highlights the listing of the first "commercial reform insurance" REITs on the Shanghai Stock Exchange, which raised 1.362 billion yuan with a subscription rate of 494 times for public investors, marking a new record in the public REITs market [10]. - The real estate sector experienced a decline, with the Shanghai Composite Index and Shenzhen Component Index falling by 0.46% and 0.97%, respectively, while the Shenwan Real Estate Index dropped by 1.80% [5]. - Significant land transactions occurred in Guangzhou and Tianjin, with Guangzhou's two residential land plots selling for a total of 1.688 billion yuan and Tianjin's three residential plots fetching approximately 2.0668 billion yuan [7][9]. Market Performance - The report notes that the top five gainers in the real estate sector included Wolong Real Estate, Yunnan City Investment, and Huangting International, with respective increases of 9.71%, 4.80%, and 3.66% [6]. - Conversely, the top five decliners included Quzhou Development and Shenzhen Zhenye A, with declines of -7.74% and -6.06% [6]. Company Announcements - Poly Developments announced plans to issue convertible bonds totaling up to 8.5 billion yuan, with proceeds allocated for 15 project developments [11].