To provide a reference, selecting Hang Seng China Enterprises Index futures in Hong Kong market, the paper studies the impact of the introduction of the stock index futures on the stock market.

为了提供一个借鉴，本文选取中国香港市场的恒生中国企业指数现货与期货为对象，研究股指期货的推出对现货市场的影响。

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Shares in Asia also closed down sharply, with Japan's main Nikkei index suffering its biggest one-day drop since the 1987 stock market crash and Hong Kong's Hang Seng slumping to a three-year low.

BBC: Bush vows to stabilise US economy

Wall Street's performance followed a rebound on world markets that saw Japan's Nikkei up 6.4 percent and Hong Kong's Hang Seng post its biggest single-day gain in more than a decade.

NPR: Stocks Up On Interest Rate Expectations

Japan's Nikkei Stock Average fell 0.5% for a third-straight day, and Hong Kong's Hang Seng Index shed 1%.

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