上交所：本周共受理55家企业的发债申请 拟发行金额708.49亿元

Core Points - The Shanghai Stock Exchange (SSE) received bond issuance applications from 55 companies this week, with a total proposed issuance amount of 70.849 billion yuan [1] Regulatory Actions - The SSE's regulatory department issued 14 regulatory letters this week, including 1 inquiry letter and 13 operational letters [1] - The SSE required companies to disclose 6 supplementary or corrective announcements through ongoing supervision [1] - There were 21 cases initiated for insider trading and abnormal trading investigations due to sensitive information disclosures or significant stock price anomalies [1] Market Surveillance - The SSE took self-regulatory measures against 80 cases of abnormal trading behaviors, such as price manipulation and false declarations [1] - Stocks with abnormal fluctuations, such as *ST Suwu and *ST Yazhen, were placed under risk warning for delisting [1] - The SSE conducted special investigations on 23 major corporate events and reported 1 suspected illegal case to the China Securities Regulatory Commission [1]