Oil and banking stocks are taking the brunt of today's selling with oil pressured by rising supply from Iran, Libya and Nigeria, and banks derailed by a $14 billion fine against Deutsche Bank ( DB ). Wall Street has turned defensive Friday as pressure on the energy sector coupled with signs that inflation has picked up, pushes the Dow Jones Industrial Average and S&P 500 down to key technical supports. As a result, the Dow backed up to its 100-day moving average, while the S&P 500 continues to flirt with 2,120 support.