The Hang Seng Index in Hong Kong closed higher today, gaining 243.95 points or 0.98 percent to end at 25,207.18. The market was supported by hopes that tensions in the Middle East will ease after the United States and Iran both refrained from attacking each other, leading to lower oil prices and easing investor concerns. Meanwhile, investors are also watching the outcome of the US Federal Reserve's monetary policy meeting on Wednesday US time. The CME Group FedWatch Tool indicates that investors see a 64.2 percent probability that the Fed will keep interest rates unchanged at 3.50 to 3.75 percent.