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 nursing services specialist The Ensign Group (Nasdaq: ENSG) jumped as much as 14% in early trading today.

So what: In last night's fourth-quarter report, Ensign put the smackdown on both revenue and earnings estimates, and followed up with mighty strong guidance for 2011. The stock set new 52-week and all-time highs on the news, and has gained 65% over the past six months.

Now what: You'd expect a big move on heavy trading volume after a report like that, but the market action has actually been rather meek -- a testament to Ensign's underfollowed nature. Combined with the unglamorous industry in which the company makes its hay, we're looking at a classic high-growth opportunity. So it's no wonder that the stock is nearly as popular as health giants MedcoHealth Solutions and UnitedHealth Group among your fellow Fools.

Interested in more info on Ensign Group? Add it to your watchlist.

Fool contributor Anders Bylund holds no position in any of the companies discussed here. UnitedHealth Group is a Motley Fool Inside Value selection. MedcoHealth Solutions and UnitedHealth Group are Motley Fool Stock Advisor recommendations. Motley Fool Options has recommended a diagonal call position on UnitedHealth Group. The Fool owns shares of UnitedHealth Group. 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 is investors writing for investors.