SEBI has made changes in the "exercise mechanism" of option contracts on commodity futuresNew Delhi: Securities and Exchange Board of India (SEBI)on Monday made changes in the "exercise mechanism" of option contracts on commodity futures.The markets regulator said that the changes wereeffected on the basis of feedback receivedfrom stock exchanges as well as recommendations given by theCommodity Derivatives Advisory Committee of SEBI.The regulator in a circular said that the prescribed mechanism will be adopted by exchanges for exercise of the options contracts on expiry.Under the mechanism, it said that All In the Money (ITM) option contracts will be exercised automatically, unless 'contrary instruction' has been given by long position holders of such contracts for not doing so.Besides, All Out of the Money (OTM) option contracts shall expire worthless, it added.All exercised contracts within an option series shall be assigned to short positions in that series in a fair and non-preferential manner, the regulator said.The new framework will be effective from the date of new series of commodityderivatives launched on or after February 1, 2022, SEBIsaid.In June 2017, the regulator permitted commodity derivatives exchanges to introduce trading in options on commodity futures and stipulated guidelines with regard to the product design and risk management framework to be adopted for trading in options on commodity futures.