SINGAPORE - Long-awaited comments by US Federal Reserve chief Janet Yellen on Friday left many investors' questions still unanswered and punters expressed their uncertain mood with another stagnant market on Monday.

The local benchmark Straits Times Index rose just 4.78 points, or 0.14 per cent, to close at 3,330.28.

Ms Yellen, speaking at the Fed's annual symposium, gave no indication as to when the Fed might likely start raising interest rates - an issue that the market has been pondering for many months.

Market activity in Singapore was rather muted, with just 1.32 billion shares worth $763.1 million changing hands.

There were 178 gainers, versus 210 losers.

Chinese property developer Weiye Holdings was the top active, rising 0.3 cents to 4.6 cents, after saying last week that it was entering talks for potential cooperation in projects in Malaysia and Singapore.