Asian markets closed higher on Thursday after U.S. Federal Reserve May meeting minutes indicated an unwinding of its balance sheet likely towards year-end and as investors look ahead to an OPEC gathering widely expected to extend output cuts.

An investor looks at an electronic board showing stock information at a brokerage house in Shanghai on March 16, 2017. Johannes Eisele | AFP | Getty Images

Minutes released yesterday indicated that the Fed could use a system where cap limits are implemented on how much the Fed would roll off every month without reinvesting. The central bank's balance sheet is currently worth $4.5 trillion. While the Fed signaled that interest rates could be raised soon, Federal Open Market Committee (FOMC) members also indicated in the minutes that "it would be prudent" to wait for more evidence that reflected the softer economic data out of the U.S. was transitory. National Australia Bank Economist Tapas Strickland said in a Thursday morning note that the trajectory for interest rates after the likely June hike were "slightly more uncertain" due to inflation outlook from the Fed.

The dollar fell while stocks rose following the release of the minutes. The dollar index, which measures the dollar against a basket of rival currencies, traded as low as 97.093 after the news. "A modest post-release fall in the dollar suggests messaging from the Fed was slightly less hawkish than some feared," CMC Markets Chief Market Strategist Michael McCarthy said. The dollar index sank to 96.995 at 2:45 p.m HK/SIN.

The Nikkei 225 gained 0.36 percent or 70.15 points to close at 19,813.13 while South Korea's benchmark Kospi index surged 1.1 percent or 25.59 percent to end the session at 2.342.93. Down Under, the ASX 200 closed in the green, edging higher by 0.36 percent or 20.625 points to finish at 5,78936. Markets in greater China were were higher a day after Moody's downgraded the credit rating of the world's second largest economy. Hong Kong's was up 0.6 percent while the mainland Chinese markets reversed earlier losses to close higher. The jumped 1.43 percent or 43.7971 points to close at 3,107.873 while the Shenzhen Composite ended trade higher by 0.725 percent or 13.0341 points at 1,811.9033. Indonesian markets were closed for a holiday. Markets are also likely to be watching the highly-anticipated OPEC meeting in Vienna. Major oil producers are expected to extend output cuts in a bid to rebalance bloated oil markets.

While U.S. West Texas International (WTI) crude will likely gain if output cuts are extended, FXTM Research Analyst Lukman Otunuga said oil prices remained caught between optimism over the OPEC-led deal and U.S. shale limiting gains. "I believe that U.S. shale is a significant threat to the OPEC deal, especially when considering how the surging output from the U.S. has seized market share from other OPEC members ... While it may be too early to say that this is the end of OPEC, U.S. shale has considerably weakened the cartel's grip on the global markets," Otunuga said in a note. Oil prices were higher ahead of the upcoming meeting. U.S. crude added 0.74 percent to trade at $51.74 a barrel while Brent crude rose by 0.82 percent to $54.40. Hong Kong's rating was downgraded by Moody's yesterday. This followed the rating agency's downgrade of China's credit rating for the first time since 1989. Moody's said the Hong Kong downgrade was due to the impact of China credit trends on Hong Kong. In South Korea, SK Hynix said the company's chip foundry business would be spun into a separate company. A company spokeswoman told CNBC that the company had made the decision to "elevate the long-term competitiveness of the foundry business." After Samsung, SK Hynix is the world's second largest chip maker. Shares of the company closed flat at 55,800 won a stock.

Over in China, brokerages Citic Securities, Haitong Securities and Guosen Securities were fined by regulators for violating financing rules. Shares of the brokerages, however, shrugged off the fines to trade higher in Hong Kong and the mainland. Mainland-listed shares of the brokerages reversed earlier losses to close higher. Citic Securities surged 3.99 percent , Haitong rose 2.44 percent and Guosen jumped 3.8 percent. Citic and Haitong shares traded in Hong Kong also gained, surging 2.92 percent and 4.4 percent respectively at 3:05 p.m. HK/SIN. In other currency news, the yuan hit an almost two-month high against the dollar earlier in the session. in the onshore market jumped to trade at 6.8690, but softened to trade at 6.8735 at 2:45 p.m. HK/SIN. Reuters reported that this was due to the sale of dollars by state-owned banks in the onshore market. Onshore yuan closed the last session at 6.8895.