Barron'sDel Taco shares plunge on weak 3Q resultsNation's Restaurant NewsHigher French fry and avocado prices and slower traffic sent shares of Del Taco Restaurants Inc. down more than 18 percent Friday. The Lake Forest, Calif.-based Mexican chain said late Thursday that its profit margins were lower than expected in the ...Del Taco Restaurants' (TACO) CEO John Cappasola on Q3 2017 Results - Earnings Call TranscriptSeeking AlphaWhy Del Taco Restaurants, Inc.