Banks should seek more capital

http://www.reuters.com/article/businessNews/idUSWBT00848420080228?feedType=RSS&feedName=businessNews

Banks should seek more capital. The obvious question comes to mind is why would banks need to seek more capital if the current ratios are adequate. In periods of expected weak economic growth there are going to be less opportunities to deploy such capital and in turn harder for the banks to pay high interests on such borrowed capital. So why seek more capital? Maybe there are more losses that are going to impair the banks capital ratios further. When Bernanke says it and doesn't explain why this is the only explanation I can find.