shares of shake shack inc shak headed more than 6 lower in the extended session thursday after the fastcasual restaurant reported a fourthquarter loss that was greater than wall street expected and said the timing of a full recovery is still uncertain shake shack said it lost 97 million or 25 cents a share in the fourth quarter compared with a loss of 194 million or 50 cents a share in the yearago period adjusted for onetime items the company lost 11 cents a share in the quarter revenue rose 29 to 2033 million the company said analysts polled by factset expected a loss of 18 cents a share on sales of 203 million digital sales including orders placed on the shake shack app website and thirdparty delivery platforms represented 42 of sales the company said shake shack guided for firstquarter revenue between 196 million and 2014 million and said it would not provide fullyear guidance due to uncertainty and resulting material economic impact caused by the pandemic the timing of a return to precovid sales levels is highly dependent upon the return of the hightraffic areas that contributed to many of the strongest shack sales including those most reliant on travel schools offices and major gatherings the timing of that recovery remains unknown today it said shake shack stock ended the regular trading day down 46