What happened Dunkin' Brands (NASDAQ: DNKN) shareholders underperformed a weak market last month. Their stock fell 20% compared to a 12.5% decline in the S&P 500, according to data provided by S&P Global Market Intelligence. The slump left shares down over 33% so far in 2020, compared to a 22% drop in broader indexes. Image source: Getty Images. So what The coffee and snack giant joined most restaurant industry peers in falling last month as COVID-19 forced dramatically lower customer traffic at restaurants and fast-food chains. Dunkin' switched to carry-out and delivery service on March 17, for example, to comply with government efforts to slow the spread of the virus. Investors are worried about the loss of short-term revenue and the uncertainty around when Dunkin' will be able to reopen its full dining services. Now what Dunkin' reported cash holdings of over $700 million as of Dec. 28, which should help it navigate through any short-term disruption in sales. Yet it appears that aggressive social distancing efforts will last at least six weeks and produce a significant drag on its early 2020 revenue and profit trends. 10 stocks we like better than Dunkin' Brands GroupWhen 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 Dunkin' Brands Group 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 March 18, 2020 Demitrios Kalogeropoulos has no position in any of the stocks mentioned. The Motley Fool recommends Dunkin' Brands Group. The Motley Fool has a disclosure policy.Source