Shake Shack doubles down on share offer

FAST food chain Shake Shack followed on from its stockmarket debut on Friday with news last night that its underwriters are issuing more shares, increasing the float’s proceeds by 15 per cent to $121m (£80.5m). The float has been a successful one for the New York-based burger joint, with a market value of $1.2bn after its first day publicly-listed.