What happened BJ's Warehouse Club (NYSE: BJ) shareholders dramatically outperformed the stock market last month. The stock jumped 37% in May compared to a 4.5% increase in the S&P 500, according to data provided by S&P Global Market Intelligence. The rally added to significant gains since the start of 2020, as the retailer's stock is up over 60%. Image source: Getty Images. So what Investors applauded the chain's fiscal first-quarter earnings results, which showed booming sales growth through the early days of the COVID-19 pandemic in North America. The warehouse retailer said revenue jumped 27% at existing locations in the period compared to a 1% uptick during the prior full fiscal year. That result compared favorably to the 10% increase that Walmart's (NYSE: WMT) Sam's Club reported, and to Costco's (NASDAQ: COST) 8% boost. Now what BJ's had trailed these peers in prior quarters, so investors will be watching the next few earnings reports to see if the Q1 metrics represent a sustainable change in its market share trajectory. That's the surest way the consumer staples giant can improve its long-term profit potential while boosting shareholder returns at the same time. 10 stocks we like better than BJ's Wholesale Club Holdings, Inc.When investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and BJ's Wholesale Club Holdings, Inc. wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of April 16, 2020 Demitrios Kalogeropoulos owns shares of Costco Wholesale. The Motley Fool recommends Costco Wholesale. The Motley Fool has a disclosure policy.Source