Apple Inc AAPL.O, Amazon.com Inc AMZN.O, Microsoft Corp MSFT.O and Google-parent Alphabet Inc GOOGL.O fell between 1.6% and 1.6%. By Johann M Cherian Feb 21 (Reuters) - Wall Street's main stock indexes fell more than 1% on Tuesday as gloomy forecasts from retailers Home Depot and Walmart added to worries that a sharp rise in interest rates and high inflation were taking a toll on the U.S. economy. Walmart WMT.N, the world's largest retailer, shed 0.2% after it forecast full-year earnings below estimates and painted a grim picture of hotter-than-expected food inflation squeezing profit margins.