TOKYO, July 9 : Japan's Seven & i Holdings booked a 61 per cent rise in first-quarter operating profit after volatile energy markets boosted U.S. gasoline sale margins, and hiked its full-year outlook on a sharp decline in the yen.The 7-Eleven operator generated operating income of 105 billion yen over the Ma

TOKYO, July 9 : Japan's Seven & i Holdings booked a 61 per cent rise in first-quarter operating profit after volatile energy markets boosted U.S. gasoline sale margins, and hiked…

By Kosaku Narioka and Ronnie Harui