By Daniel Inman

Hong Kong was dragged down by a sharp fall in HSBC Holdings, after the bank's earnings report disappointed the market, while Japan continued to be weighed by a stronger yen.

HSBC (HBC), which announced its interim earnings after the market closed on Monday, slumped 4.5%. Although the bank reported a 23% increase in net profit for the first half of the year, its stock was hit by fears that its revenues were being affected by slowing growth in emerging markets.

As the single largest constituent in Hong Kong's Hang Seng Index , accounting for around 15% of the index, the bank's decline weighed on the entire market. The Hang Seng fell 1.6%.

Australia's S&P/ASX 200 dropped 0.1% before the Reserve Bank of Australia's rate decision, due to be announced later Tuesday.

Expectations for lower interest rates are high, with all 15 economists surveyed by The Wall Street Journal forecasting a rate cut. A quarter of a percentage-point reduction in rates would bring the cost of borrowing to a record low of 2.5%.

The central bank has already slashed interest rates seven times since late 2011, as a weakening mining sector has prompted policy makers to use monetary policy to support growth in other parts of the economy.

The Australian dollar (AUDUSD), which hit a three-year low against its U.S. counterpart on Monday, was slightly before the announcement at 89.29 U.S. cents.

The U.S. dollar weakened against the yen (USDJPY) on Tuesday, putting pressure on stocks in Tokyo. The greenback was at Yen97.98, compared with Yen98.30 late Monday in New York. The Nikkei Average dropped 1.2%

"The summer doldrums are upon us, with participation levels low and trading incentives -- aside from earnings-related news -- relatively few," said Hiroichi Nishi, general manager of equities at SMBC Nikko Securities.

Mitsubishi Materials Corp. rose 2.6% in Tokyo after the Nikkei reported that its group operating profit for the first quarter is believed to have risen more than 30% on year to about Yen15 billion ($153 million), driven by an improvement in its copper segment and a weaker yen.

Also in Tokyo, Toshiba Corp. (TOSYY) outperformed the broader market, down just 0.5% after a separate Nikkei report said that the company plans to build a NAND flash-memory factory in a joint venture with SanDisk (SNDK), with the total investment estimated to be Yen400 billion.

In Taiwan, where the Taiex was 1.3% lower, phone maker HTC Corp. (HTCXF) dropped 3.2% after it posted a 37% year-on-year drop in revenue in July. The technology firm's stock has been under pressure in recent months and has lost 50% of its value so far this year.

South Korea's Kospi fell 0.8%, the Shanghai Composite was down 0.6%, and Singapore's Strait Times Index lost 0.5%.

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