3-6-3 Rule

The 3-6-3 rule was first mentioned in Liar's Poker by Michael Lewis when he used it to refer to the 3-6-3 club who are a money lenders (thrifters) who borrow money at 3%, lend it at 6% and are out on the golf course by 3pm. Michael Lewis' typical 3-6-3 man was a balding, middle-aged man who thought of nothing but money.

The term has become common slang to refer to the practices of the Savings & Loans (S&L) industry in the pre-internet days. Increased competition due to the popularity of the web has forced tighter margins onto this industry.