Snapping two days of losses, the Sensex at the Bombay Stock Exchange ended with a slim gain of 22 points, or 0.1 percent, at 18,882, today. The Nifty at the National Stock Exchange closed flat, at 5,655.In the key regional bourses, the Chinese market led the fall, losing 3 percent, while the markets in Hong Kong, South Korea and Singapore slipped between 0.2 percent and 0.5 percent.