Asian stock markets are rallying on Tuesday after oil prices hit a six-month high on signs the global supply glut is easing. Brent crude, the international benchmark, is trading close to $50 per barrel while West Texas Intermediate (WTI), the US benchmark, is around $48. Oil prices have gained more than 80% since hitting a 12-year-low earlier this year. Both Japan's benchmark Nikkei 225 and the broader Topix are up about 0.7%. In Australia, the commodities-heavy benchmark S&P ASX 200 index rose 0.3%, led by gains in energy-related shares. Over in South Korea the Kospi swung between gains and losses. In Greater China markets, both the Shanghai Composite and Hong Kong's Hang Seng are lower about 0.1%.