Why Mark to Market Margin collected daily in commodity market?
Collecting mark-to-market margin on a daily basis reduces the possibility of accumulation of loss, particularly when futures price moves only in one direction. Hence the risk of default is reduced. Also, the participants are required to pay less upfront margin-which is normally collected to cover the maximum, say, 99.9%, of the potential risk during the period of mark-to-market, for a given limit on open position. Alternatively, for the given upfront margin the limit on open position would have to be reduced, which has effect of restraining the trade and liquidity.