TOKYO (AP) — Global stock markets sagged Tuesday as gloomy manufacturing data from China and weak investment figures in Japan augured further uncertainty for investors after a brutal August.

KEEPING SCORE: Britain's FTSE 100 fell 2.0 percent in early trading to 6,121.63 and Germany's DAX sagged 2.5 percent to 9,999.66. France's CAC 40 lost 2.3 percent to 4,544.69. Wall Street also looked set to start off on a weak footing. Dow futures were down 1.9 percent and S&P futures lost 2.1 percent.

CHINA MANUFACTURING: An official index of Chinese manufacturing fell to a three-year low last month in another sign of slower-than expected growth in the world's No. 2 economy. The manufacturing index based on a survey of factory purchasing managers fell to 49.7 in August from 50.0 in July, indicating a contraction.

ANALYST VIEWPOINT: "While a measure of calm has returned to these markets recently and they have seen relief rallies, many of the underlying negative fundamentals are still in place," Nariman Behravesh, chief economist for IHS, said in a report. "As a result, the downside risks for most commodity prices, exchange rates, and stock markets are likely to persist for some time, while growth in many parts of the world, especially in emerging markets, is likely to deteriorate further."

JAPAN DATA: Measures of industrial production and capital spending, reported Monday and Tuesday, have undershot analysts' estimates, suggesting the economy may not have recovered as strongly as expected this summer from a contraction in the April-June quarter. However, a purchasing managers' index for August showed improvement, with new order growth rising to a seven-month high.

GOODBYE AUGUST: August was a miserable month for investors. Worries over China's slowdown and the timing of an interest rate hike by the Federal Reserve pushed shares sharply lower before moves by the Chinese central bank helped to stabilize the markets, at least temporarily. The Standard & Poor's 500 still finished August down 6.3 percent, its worst showing since May 2012.

ASIA'S DAY: China's Shanghai Composite Index dropped 1.2 percent to 3,166.62 after dipping nearly 5 percent earlier in the session. Japan's Nikkei 225 was also volatile, dropping 3.8 percent to 18,165.69. The Hang Seng in Hong Kong sank 2.2 percent to 21,185.43. South Korea's Kospi slid 1.4 percent to 1,914.23. Australia's S&P/ASX 200 fell 2.1 percent to 5,097.40 and shares in Southeast Asia were also lower.

ENERGY: Benchmark U.S. crude fell $1.80 to $47.40 in electronic trading on the New York Mercantile Exchange. It had surged $3.98, or nearly 9 percent, to $49.20 on Monday after the U.S. Energy Department cut its oil output estimate. Brent crude, the international standard, dropped $1.99 to $52.16 a barrel.

CURRENCIES: The dollar fell to 120.11 yen from 121.20 yen on Monday. The euro rose to $1.1312 from $1.1225.

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