Rahul Narang's tech fund has gotten top marks for risk-adjusted returns for 2 years running. He's done it in part by focusing on stocks that other investors won't touch. (CMTFX, AAPL, AMZN, AVGO, MU, TSM)

· Rahul Narang runs one of the best-performing tech funds over the last five years, the Columbia Global Technology Growth Fund.
· His strategy has been to focus on the two ends of the tech market — the most and least expensive stocks; over time, both have performed better than those in the middle, he told Business...