SAB drags VN-Index to slight loss. During the morning session, it looked like the market was going to extend its winning streak from last week with solid gains as the index traded a hair below 680 in the first half hour. However, stocks saw a steady decline in the afternoon, leaving the index to close with a small loss. The second-largest listed company by market cap, SAB (-5.8%), fell for the first time after doubling over its first nine days of trading.