TJX has silently outperformed the S&P 500 and many artificial intelligence (AI) stocks over the past five years.TJX (TJX 0.23%) has silently outperformed the S&P 500 (^GSPC +0.88%) with a 28% gain this year and a 129% return over the past five years. The discount clothing retailer owns T.J. Maxx, Marshalls, HomeGoods, Sierra, and other stores.Everyone needs clothing and home goods, and many of those people look for discounts. That formula has worked for the company ever since T.J. Maxx was founded in 1976.H ...