shares of presto automation were trading lower afterhours friday following a 63 gain in the stocks price during the days regular trading session at 518 pm et the companys shares were trading nearly 13 lower at 314 each volume at the time topped 445000 shares the stock price closed at 359 with volume topping 10 million shares above the stocks 65day average volume of some 25 million shares the companys chief executive krishna gupta told cnbc that presto was receiving calls from potential customers about the companys artificial intelligence product for restaurant drivethrus year to date the stock is up by more than 56