Profit for the third quarter ended June 30 dropped to US$170.5 million, or 30¢ a share, from US$204.4 million, or 34¢, a year earlier, the Omaha, Nebraska-based company said in a statement.

The company said it would take a one-time charge of between 5¢ and 10¢ share in the current quarter, after agreeing to a settlement, announced Monday, to buy back auction rate securities.

Net revenue slipped 1.6% to US$613.8 million

Parent company TD Bank Financial Group announced said it expects TD Ameritrade’s third quarter earnings to translate into a contribution of $68 million to third quarter net income for its Wealth Management segment.

TD Bank will release its third quarter financial results on August 27.

IE