Investools' online brokerage posts higher DARTs

CHICAGO, Jan 15 (Reuters) - Investor education services company Investools Inc (SWIM.O) said on Wednesday its online brokerage arm, thinkorswim, reported a 280 percent jump in its December daily average revenue trades (DARTs) over the same period in 2006, helped by new customer accounts.

The increase in DARTs came as December saw an industrywide slowdown in overall trading activity, Investools said in a statement.

Thinkorswim reported DARTs of 39,100 for December and added 6,700 new accounts.

Client assets at thinkorswim last month were $2.58 billion, up 134 percent from December 2006.

Separately, Investools reported account growth in December. Active subscribers were 102,800, up from 85,400 a year earlier. (Reporting by Doris Frankel; editing by John Wallace)