By Saikat Chatterjee
HONG KONG (Reuters) - Asian stocks fell to three-week lows on Tuesday as a deepening rout in Chinese stocks erased risk appetite - sending investors flocking to safe-haven instruments such as government bonds and the Japanese yen.
MSCI's broadest index of Asia-Pacific shares outside Japan <.MIAPJ0000PUS> fell 0.8 percent in early deals, its lowest level since July 9 as mainland Chinese indexes opened 2- 5 percent lower.
"Volatility is the enemy of investor appetite," said the head of index trading at a U.S. fund. "Any sign of government support to prop up the market will be used by investors to exit the market completely rather than add fresh positions."
Since hitting a peak in early June, Chinese shares have gone through a roller-coaster ride with main China indexes falling by a third in less than a month before rebounding by a quarter, only to stage its biggest one-day fall since 2007.
While broader Asian markets have been initially resilient to the fireworks in Chinese stocks, they have started to move more closely in step with the mainland over recent days in the absence of fresh triggers elsewhere.
Correlations between the MSCI gauge for regional stocks and the Shanghai index <.SSEC> has risen to 0.5 - its strongest in nearly a year - indicating the market rout is starting to have a broader regional impact.
Tokyo's Nikkei <.N225> fell more than 1 percent, with a strong yen accelerating the decline. Australian shares <.AXJO> fell 0.9 percent and South Korea's Kospi <.KS11> shed 1 percent.
Investor sentiment was also cautious ahead of a two-day U.S. Federal Reserve meeting beginning later today where some investors believe the Fed's rate-setting Open Market Committee will make its case for hiking rates as early as September.
Overnight, the Dow <.DJI> dropped 0.7 percent and Nasdaq <.IXIC> fell 1 percent while share indices in Frankfurt and Paris tumbled more than 2.5 percent.
In currencies, the dollar was on the back foot at 123.12 yen
The euro was little changed at $1.1091
Bonds were the solitary bright spot in Asia with U.S. Treasuries and Japanese government debt standing tall in a sea of red across stock markets as investors dumped riskier bets.
Ten-year Japanese bond yields
Oil struggled at four-month lows after the Chinese stock market crash fueled worries the world's biggest energy consumer may cut back and as more evidence emerged of a global crude supply glut. [O/R]
U.S. crude
Copper
The broader Thomson Reuters CRB commodities index <.TRJCRB> also hit a six-year low.
(Additional reporting by Shinichi Saoshiro in TOKYO; Editing by Eric Meijer)