Question regarding the existence of goods in Mcx online commodity trading

Dear friends. I want to enter in online commodity trading through MCX. I gathered required informations.but only two things I want to know. Firstly, investors buy and sell huge volume of lots in all products.Each and every lots of all traded products are really physically exists with MCX. And second question is: why Mcx set expiry for non expirable metals and what they do the same after expire date. Pls clarify

Ah, you look like a complete newbie. All trading that happens on MCX is on the futures and not the actual physical underlying. By expiry date, it means expiry of a futures contract and not the commodity. Trading in commodity futures is risky if you are not sure about what you are doing. Suggest you to go through Varsity once completely: