* BOK raises rates by 25 bps, as expected * PBOC sets firmer-than-expected official guidance * Eyes on Fed's Jackson Hole symposium * Bearish bets on yuan at 3-month high - Reuters poll By Upasana Singh Aug 25 (Reuters) - Thailand's baht and South Korea's won were the top gainers among Asian emerging currencies on Thursday as the dollar retreated ahead of the U.S. Federal Reserve's Jackson Hole conference. Kuala Lumpur's main stock index gained 1.7%, while Singapore's benchmark index led declines in the region by losing 2.1%. The spotlight is squarely on Fed Chair Jerome Powell's speech at the annual monetary policy conference in Jackson Hole, Wyoming, due to begin on Friday.
Jardine Matheson plans to pay a higher interim dividend of 55 US cens.
Jardine Matheson posts 1Q business updates.