The Asian markets have posted gains in early trades following a smart rally in the US markets.The Nikkei has surged 387 points to 14,887. The Hang Seng has flared up 347 points to 16,445.The Seoul Composite index has gained almost 3% at 1268. The Straits Times and Taiwan Weighted indices are up around 2% each at 2386 and 6417, respectively.