Welcome to the rap. I'm Sam Bartis here to take you through this week's market action. Prior to Friday's selling action, the S&P 500, NASDAQ 100, and Russell 2000 each hit all-time highs earlier in the week.But Friday's drop washed away any gains as all four major indices finished in the red. The Nasdaq falling 3 and a half% Friday. The Dow dropped nearly 900 points, while the S&P 500 fell 2.7%, its biggest single day drop since April.Only two sectors of the S&P 500 managed to post gains this week with util ...