Kevin Hincks believes Friday's trading day will see heavy volume due to triple witching, but he says you'll also want to watch crude oil as a key indicator to geopolitical volatility. He looks overseas to the Bank of Japan's interest rate hike and explains why it's putting upward pressure on U.S. Treasury yields just after the Fed made its decision. In equity movers, Kevin highlights headlines that Warren Buffett will step down as chairman of Berkshire Hathaway (BRK/B).