Just last week we learned from the F.D.I.C. that lending by U.S. banks plunged by 3 percent in the third quarter, the largest drop since at least 1984 when this kind of information was first collected. This represents the fifth consecutive quarter in which banks have reduced lending. According to the report, banks reduced the amount of money extended to their customers by $210 billion between July and September, cutting back in almost every category, from mortgage lending to business lending.