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 oil tanker fleet operator Teekay Tankers (NYSE: TNK) refueled today, jumping as much as 11.3% on heavy trading volume.

So what: The shipper got a rare dose of love from Wall Street as Bank of America Merrill Lynch upgraded the stock from a sell to a buy with a generous price target of $12 per share. That's 23% above last night's closing price, and would take the stock back to levels not seen since early February.

Now what: The company has a history of strong cash flows and generous dividends, with an 11% yield fully in class with income-generation favorites BP Prudhoe Bay Royalty Trust and Encore Energy Partners. But those two have also provided positive stock returns over the past year, while Teekay's yield is juiced by a depressed share price. This could be the turning point for Teekay, after which the stock returns to a higher level but loses a bit of that tasty dividend yield in return.

Interested in more info on Teekay Tankers? Add it to your watchlist.

Fool contributor Anders Bylund holds no position in any of the companies discussed here. 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.