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 power system maker Vicor (NASDAQ:VICR) jumped 13% today after the company released earnings.

So what: Revenue was up 4% to $55.1 million and net loss was $932,000, or $0.02 per share. However, sequentially revenue was up 17.5% and results came in ahead of the company's own expectations.  

Now what: Results have been choppy over the past year, but Vicor appears to have momentum since revenue bottomed out in the first quarter. Management is also positive about its new products based on ChiP technology being designed into new products for next year. I'd still like to see more than a single quarter of profit before jumping into the stock, so I'd watch how revenue and new product momentum improves over the next year for a buy sign.