The Sensex at the Bombay Stock Exchange declined 94 points, or 0.5 per cent, to close at 19,324, today, amid growth concerns, and the monthly expiry in the derivatives segment. The Nifty at the National Stock Exchange fell 36 points, or 0.6 percent, to 5,870But stock markets in Japan, Hong Kong, South Korea and Singapore gained between 0.1 percent and 0.9 percent.