Core Viewpoint - The A-share market is experiencing an unprecedented wave of delistings due to major violations, with a record number of companies forced to delist as regulatory scrutiny intensifies [1][6][10] Group 1: Delisting Trends - As of October 15, 2023, 13 companies have triggered mandatory delisting indicators due to major violations, marking a historical high [6][10] - Among these, 8 companies have already been delisted, including notable cases like Zhuolang Technology and Dongfang Group [6][10] - The delisting wave has highlighted the role of investment banks as gatekeepers, with 11 brokerage firms involved in the delisted companies [1][6] Group 2: Investment Banks' Responsibilities - Many problematic companies frequently changed their investment banks during periods of financial misconduct, complicating accountability [2][10] - Most involved investment banks issued "no objection" or "no issues found" reports during the supervision period, raising questions about their diligence [2][10] - The regulatory environment is pushing investment banks to reassess their responsibilities and improve their oversight practices [2][15] Group 3: Case Studies of Violations - ST Dongtong, involved in financial fraud from 2019 to 2022, had its investment bank, First Capital, implicated in fraudulent activities during a stock issuance [8][12] - Guohua Securities was the only firm to issue a risk warning regarding Jiuyou Co., while others remained silent despite ongoing fraud investigations [12][13] - Highong Data had the longest duration of fraud (2015-2023) and changed investment banks multiple times, indicating a pattern of evasion [10][11] Group 4: Regulatory Impact on Investment Banks - The shift towards stricter regulations has led to increased scrutiny of investment banks' roles, with many now enhancing their due diligence processes [15] - Investment banks are reportedly increasing their manpower and resources dedicated to ongoing supervision, reflecting a shift in focus due to regulatory pressures [15]