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 BOK Financial (Nasdaq: BOKF) surged as high as 16% in early Monday trading after a Wall Street analyst upgraded the regional bank from "hold" to "buy."

So what: Along with the upgrade, Stifel Nicolaus upped its price target on the shares to $56, representing about 23% worth of upside to their previous close. At the time of publication, BOK shares are well off their highs of the day (only up about 3% now), so much of that upside remains intact.

Now what: Fools know to take analyst upgrades with a grain of salt, but BOK seems worth looking into. Thanks to disciplined underwriting, a solid financial position, and wide product diversification, BOK remains much more protected from heavy loan losses than many other regional banks. With the stock still down more than 13% in August alone and sporting a relatively safe 2%-plus dividend yield, BOK might be a timely pick, as well.   

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

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.