Futures are standardized forward contracts traded on exchanges, so item A is correct; Financial futures contracts mainly include interest rate futures, currency futures and stock index futures, so eight items are correct; Currency futures can be used to avoid exchange rate risks, so item C is wrong; Stock index futures do not involve the delivery of the stock itself, its price is calculated according to the stock index, and the contract is delivered in the form of cash settlement, so item D is wrong; One of the economic functions of the futures market is to avoid market risks, so item E is correct.