Global Markets: Asian shares off highs, US Federal reserves' stance underpins Asian stock markets

Positive economic reports from Asia failed to lift Asian shares as investors continued to assess regional earnings results and ahead of key data such as China's official manufacturing PMI and U.S. monthly nonfarm payrolls on Friday.

The MSCI's broadest index of Asia-Pacific shares outside Japan fell 0.4 percent after rising 1.3 percent over the past two sessions to nearly an 18-month high. The index was set for a monthly gain of about 2.4 percent.

Australian shares eased 0.4 percent, taking a breather from their 10-day winning streak, the longest in more than nine years, which hoisted local shares to 21-month highs.

"Certainly 2013 has started with an air of optimism. U.S. politicians show some willingness to deal with problems, no fresh issues have emerged in Europe and the Chinese economy is exhibiting firmer growth. Volatility has receded with investors keen to put cash to work in other asset classes," said Craig James, a strategist at CommSec in Sydney.

Southeast Asian stock markets were generally softer but remained near their highs. The Philippines hit a record high for the third day running on Wednesday and Thailand's market surged to a more than 18-year high on Wednesday.

The Federal Reserve on Wednesday kept in place its monthly $85 billion bond-buying stimulus plan, arguing the support was needed to lower

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