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The Thai baht outperformed regional peers as offshore hedge funds covered short positions.
Malaysia's ringgit rose on demand from oil exporters. The Singapore dollar gained, tracking a stronger euro.
The Indonesian rupiah turned firmer on expectations of inflows to the government's bond auction. The country aims to sell 10 trillion rupiah ($862.9 million) in bonds.
Meanwhile, the South Korean won ended local trade weaker on dollar demand from offshore funds and domestic importers.