CNBC | Stocks try for gains after oil settle; Yellen eyed CNBC U.S. equities traded in a wide range on Tuesday as U.S. oil prices seesawed and investors looked ahead to Fed Chair Janet Yellen's testimony. "It's the oil tail wagging the market dog," said Art Hogan, chief market strategist at Wunderlich Securities. US stocks retreat, led by energy sector, as oil tumbles again |