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 Vince Holding (NYSE:VNCE) were up as much as 14% today after the apparel seller sped past estimates in its first-quarter earnings report. 

So what: Vince posted a per-share profit of $0.04, better than analyst expectations of a penny, while revenues jumped 32.4% to $53.5 million, ahead of estimates of $48.8 million. Same-store sales improved 11.1% and gross margin shot up 600 basis points to 49.4% though that was mostly due to cycling additional inventory reserves from a year ago. CEO Jill Granoff said performance was strong across the board, saying the company had "another terrific quarter."

Now what: Looking ahead, Vince raised its full-year EPS guidance to $0.88-$0.92 from $0.85-$0.90, against estimates of $0.88. It also sees same-store sales in the high single-digit to low double-digit range, and full-year sales of $325-$340 million, in line with the consensus at $335.2 million. With seven to eight new stores expected and wholesale revenue up 29% in the past quarter, Vince appears to be firing on all cylinders. Shares are priced for growth, but I'd expect them to keep moving higher if the company can deliver more quarters like this.