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 gas equipment manufacturer Chart Industries (Nasdaq: GTLS) shot up 17% in intraday trading on heavier-than-normal volume.

So what: It appears that Chart shareholders have Morgan Stanley (NYSE: MS) to thank today. The broker upgraded Chart from "equal-weight" to "overweight," bumped up its 2011 and 2012 earnings estimates for the company, and said that the company stands to be a big beneficiary as liquefied natural gas (LNG) takes a bigger role on the energy playing field.

Now what: Combine today's upgrade with a strong earnings report last month that showed earnings above analysts' expectations and higher guidance from management and you've got a recipe for excitement. However, shares are now up a scorching 32% in less than a month, so investors may want to wait and see if shares cool off a bit before trying to grab at them.

Want to keep up to date on Chart Industries? Add it to your watchlist here.