The new framework to curb instances of stock market spoofing kicked off on Monday, whereby serial offenders could face trading disablement of 15 minutes to two hours. In spoofing, traders place a large number of buy or sell orders, with an intent to cancel before those orders can be executed. Market experts say that excessive cancellations of large orders lead to manipulative increases or decrease in prices, which impacts retail investors. "Sebi and exchanges in a joint meetinghave decided that, in order to further strengthen the order level surveillance mechanism, there shall be an additional order based surveillance measure to deter persistent noise creators i.e. excessive order modifications/ cancellations with an intent to avoid execution," BSE and NSE had said in circulars last month.