Returns are likely to be overstated given that poor performers will drop out of the index (so-called survivorship bias) and that only funds that are initially successful will agree to report their numbers.
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The benchmark Shanghai Composite Index has fallen nearly 17% over the past year, compared with a nearly 13% drop in the broader Dow Jones Asia-Pacific index over the same period.
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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.
The equities index has nearly reversed its one-month drop, after closing at 1, 331.10 on May 27.
This was the first three hundred-point drop for the blue chip index in almost a year.
Software firm Autonomy and logistics group Exel are to drop out of the FTSE-100 following the blue-chip index's quarterly reshuffle.
The Consumer Confidence Index published by the Conference Board registered a 6-point drop in December.
The Nasdaq, the US' technology index, plummeted by 39.3% last year - the biggest drop in its history - and the Dow Jones Industrial Average lost 6.2% - its first loss in 10 years.
One route is to look at market expectations: investors expect a further 20% drop, judging by the prices of futures contracts linked to the Case-Shiller 10 city index.
The National Federation of Independent Business's small-business optimism index dropped 0.2 point to 91.2 last month following a steep 3-point drop in June.
It found every 10% rise in body mass index (BMI) - used as an indicator of body fat - led to a 4% drop of available vitamin D in the body.
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