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 online family-history resource (Nasdaq: ACOM) surged 26% on Friday after its quarterly results and full-year sales outlook topped Wall Street expectations.

So what: Fueled by an impressive 33% spike in its subscriber base, Ancestry's first-quarter profit more than doubled to $9 million, or $0.18 per share, versus the average analyst estimate of $0.15 per share. While that may not seem like such a big beat, Mr. Market, who is sending the stock to new 52-week highs, is clearly thrilled with company's current business momentum.

Now what: The short term certainly looks positive for Ancestry. In fact, management raised its full-year revenue outlook range by $25 million and upped its current-quarter revenue forecast to $98 million to $100 million -- well above Wall Street estimates of $87 million. Ancestry shares are definitely on the hot side, but with its board also authorizing a $125 million stock repurchase program, they might still represent a reasonable way to go for growth.  

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