Bloomberg: Japan’s Government Pension Investment Fund has been a trailblazer in promoting the need to incorporate environmental, social and governance issues into the day-to-day job of portfolio construction. With $1.6 trillion under management, it has a lot of firepower in the investing world. So its recent stand against short selling, judging the practice to be incompatible with its role as the long-term custodian of multigenerational assets, is worth paying attention to.