With the S&P 500 (^GSPC 0.80%) down nearly 3% in the past week, and the S&P's bank stocks down 3.5%, Motley Fool financials analysts Matt Koppenheffer and David Hanson take a look at which banks may be bucking the downward trend this week. They highlight one banking merger that's gone against this trend in a big way, discuss why Canadian banks are often viewed as a safer bet in times of turmoil, and tell us why Wells Fargo (WFC 1.13%) consistently keeps its head above water, even in rough seas.