Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of ETF sponsor and asset manager WisdomTree Investments (NASDAQ:WETF) spiked as high as 15% today after its quarterly results topped Wall Street expectations.

So what: The stock has soared in 2013 on strong assets under management (AUM) growth, and today's Q3 results -- EPS of $0.11, which beat Wall Street estimates by $0.02, while revenue spiked 83% -- only reinforce that trend. Additionally, management said that it is switching its administration and custody services provider in order to save about $6 million in annual costs, giving analysts plenty of good vibes over WisdomTree's ability to grow profitably.

Now what: Don't expect the operating momentum to slow anytime soon. "We are effectively capitalizing on the greater awareness of our currency hedged equity family which is translating into significant asset growth in sister products," CEO Jonathan Steinberg said. "As we continue to grow and reach economies of scale, we are demonstrating the powerful operating leverage in our business." Of course, with WisdomTree shares up about 160% over its 52-week lows, and trading at a forward P/E of 30, much of that growth might already be baked into the valuation. 

Fool contributor Brian Pacampara has no position in any stocks mentioned. The Motley Fool recommends WisdomTree Investments. Try any of our Foolish newsletter services free for 30 days. We Fools may not 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.