Major Southeast Asian stock markets closed flat-to-weaker on thin volumes on Monday as concerns over a Greece debt default weighed on sentiment ahead of a key meeting, despite some optimism the US could overcome an imminent fiscal crunch. European officials are due to meet on Tuesday and expected to discuss a two-year funding deal for Greece, a view likely to irk the International Monetary Fund, which wants a longer-term solution. Singapore and the Philippines gained 0.2 percent each, while Thailand closed 0.3 percent firmer.
However, Indonesia lost 0.9 percent with $21.14 million in foreign outflows. Malaysia ended 0.4 percent weaker, near a two-month low, seeing $15.29 million in net foreign selling, and Vietnam closed 0.6 percent down. US lawmakers' optimism on reaching a deal to avert the $600 billion "fiscal cliff" helped boost world equities, on hopes the move could prevent sending the world's largest economy back into recession.