For $7.2 billion Columbia Select Large Cap Growth Fund , happy days are here again. At least at the moment. In 2014, the mutual fund gained 8.48% for investors, topping just 31% of its large-cap growth peers tracked by Morningstar Inc. So far this year, going into Tuesday, the fund’s 8.47% gain tops 97% of its direct rival stock funds and crushes the S&P 500’s 2.98%. It carries an IBD 36-Month Performance Rating of A. What’s changed?