March 29 (Reuters) - Hong Kong stocks drifted aimlessly and closed flat on Tuesday, ahead of a speech by Federal Reserve Chair Janet Yellen, after trading resumed following a four-day Easter weekend.
The Hang Seng index edged lower in morning trading but ended the session up 0.1 percent at 20,366.30 points. The Hong Kong China Enterprises Index rose 0.3 percent.
Gains in the consumer sector helped offset losses from energy shares, which fell sharply on lower oil prices.
Shares of Chinese beer giant Tsingtao Brewery Co Ltd fell 2.2 percent, after posting a drop in 2015 profits, the first earnings drop since 1999.
Shares of BYD Co Ltd jumped 4.9 percent in Hong Kong, far outperforming the market, after the Chinese automaker backed by Warren Buffett said 2015 net profit rose more than six times over the previous year to a six-year high.
The company said it expects that pace of growth to continue in the first quarter. (Reporting by Samuel Shen and Pete Sweeney; Editing by Richard Borsuk)