Client assets at TD AMERITRADE (NASDAQ:AMTD) have exceeded $500 billion for the first time in the company's history.  In its latest set of monthly metrics, the company revealed that the figure came in at $502.5 billion as of Feb. 28. This was a 14% increase over the same month the previous year, and 1% higher than January's number.

TD AMERTRADE quoted CEO Fred Tomczyk as saying that this happened chiefly because the company "implemented a new sales and service model, delivered new products and invested in marketing and technology to improve the investing experience for our clients."

Fool contributor Eric Volkman owns shares of TD AMERITRADE. The Motley Fool recommends TD AMERITRADE. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.