The Sensex at the Bombay Stock Exchange ended with a slim gain of 24 points, or 0.1 percent, at 17,773, amid positive Asian and European markets, today. The Nifty at the National Stock Exchange moved up 9 points, or 0.2 percent, to 5,390.Stock markets in Japan, Hong Kong, Singapore and South Korea rose about 0.6 percent, each.