Etrade Financial (ETFC, news, chart) September 3 puts are the day’s most active equity options contract early Thursday . The stock is drifting lower, down 6 cents to $2.94, and 6,800 September 3 puts traded early. 73 percent are trading offerside. Open interest in the contract is already considerable (22,171 contracts), reflecting recent worries about the impact of the credit crunch on big and small brokers alike.