SEBI, the stock market regulator in India, has introduced a new concept called 'Unaffected Price' to address artificial price fluctuations in stocks. This concept aims to mitigate the impact of market rumors by calculating the unaffected price excluding the rumor's price impact within 24 hours of a material price movement. SEBI has also issued guidelines for the 100 biggest listed firms to manage the stock market impact arising from market rumors. Additionally, SEBI has altered the methodology for calculating the market capitalization of publicly listed companies, requiring the use of the average market capitalization over six months. Furthermore, SEBI has eased minimum promoter contribution norms to facilitate regulatory challenges for companies planning an IPO.