NEW YORK—U.S. stocks ended near flat on Tuesday after a broad sell-off the day before, with worries over troubles at developer China Evergrande and caution ahead of Wednesday’s Federal Reserve policy news keeping a lid on the market. Trading was choppy, with the Dow and S&P 500 erasing session gains just before the close, while the Nasdaq finished slightly higher. Shares of Walt Disney Co. fell 4.2 percent and were the biggest drag on both the S&P 500 and Dow after Chief Executive Officer Bob Chapek said the resurgence of the Delta variant of the coronavirus was delaying production of some of its titles. Concerns over China Evergrande Group have put investors on edge and added to recent worries over economic growth from the Delta variant. Persistent default fears overshadowed efforts by Evergrande’s chairman to boost confidence in the firm on Tuesday, while Beijing showed no signs it would intervene …