The Sensex at the Bombay Stock Exchange declined 81 points, or 0.4 percent, to close at 19,565, today, after disappointing inflation data tempered hopes of a rate cut by the Reserve Bank, and as regional markets lost ground. The Nifty at the National Stock Exchange fell 28 points, or 0.5 percent, to 5,914.Stock markets in Japan, China, Hong Kong, and South Korea declined between 0.3 percent and 1 percent.