US stocks end whipsaw week sharply higher as Fed comments soothe market

Wall Street saw gains as big banks started first-quarter earnings season. The week had market swings due to the US-China trade war. Federal Reserve assurances helped. JPMorgan Chase, Morgan Stanley, and Wells Fargo reported good profits. Inflation data showed cooling, but consumer sentiment dropped. The Dow, S&P 500, and Nasdaq all closed higher. Citi lowered its S&P 500 year-end target.