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 residential solar power Vivint Solar Inc. (NYSE:VSLR) jumped as much as 14% late in trading today after an analyst upgrade.

So what: Analyst P. Jobin at Credit Suisse reiterated an outperform rating on the stock and raised his price target to $22 per share. It wasn't until the call was featured on CNBC that the stock started to move today. It may sound ridiculous, but CNBC is a common channel to have on in trading floors, and the mere mention of Vivint Solar's upgrade seems to have given the stock a boost today.

Now what: I've been saying for some time that Vivint Solar is undervalued compared with SolarCity (NASDAQ:SCTY.DL), so I'm not surprised to see it having a good year. But the company's valuation has increased to a value similar to that of SolarCity's, in relation to their annual installations.

While I like Vivint Solar's business and its relatively small market cap, I don't think an analyst's changing a price target and a mention on CNBC is a reason to jump into the stock. If shares sink in the coming weeks, it could be a nice entry point, but for now I'll sit out this pop and wait for a better buying opportunity.