Stocks ended mostly lower on Wall Street Wednesday, keeping the market on track for its fourth monthly loss this year. The S&P 500 fell 0.1%. The benchmark index has been volatile all week, and is down 20% for the year as investors worry about inflation and rising interest rates. The Dow Jones Industrial Average rose 0.3% and the Nasdaq fell less than 0.1%. Small company stocks fell sharply. Bed Bath & Beyond plunged 23.6% after reporting a far bigger loss than analysts expected and replacing its CEO. The yield on the 10-year Treasury note fell to 3.10%.