U.S. stocks fell on Tuesday as retailers' shares dropped after earnings from TJX Companies and Staples halted the market's two-day winning streak, Reuters reported. TJX Cos Inc shares slumped 7 percent to $54.34 and ranked as the biggest drag on the S&P 500 after the owner of off-price chain stores TJ Maxx and Marshalls reported lower-than-expected quarterly revenue. Staples Inc tumbled 13.1 percent to $11.64 after the office supply retailer posted first-quarter earnings andWall Street falls as retailers, Caterpillar weigh  forecast a decline in sales in the current quarter. The S&P retail index fell 0.8 percent.