Emily Reuter to succeed Nick Giovanni as CFO A string of executives have left the company in recent months Shares fall as much as 6% in extended trading Co projects Q2 key metrics above estimates May 8 (Reuters) - Instacart (CART.O), opens new tab forecast its second-quarter gross transaction value (GTV) and core profit above estimates on Wednesday, helped by a surge in grocery orders as well as higher fees for the advertisements it showcases on its grocery delivery platform. Shares of the...