In financial markets, for example, an index of stocks will rise or fall with changes in the wider market.

以金融市场为例，股票指数会在一个较大的市场中有或升或降的变化。

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At the same time, stock selection is required, is the general indicator of stock, such as Shanghai and Shenzhen 300 Index of stocks.

同时，股票选择是必需的，是一般指标的股票，如上海，深圳300指数。

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Miners and oil firms already account for some 30% of the FTSE all-share index, twice their weight in the index of global stocks (see chart).

矿业和石油公司已经占据金融时报全份额指数的30%左右，是全球股票指数中这一行业所占比重的两倍(见图表)。

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New screening methods could also enable CRSP to offer investors an index of stocks that rank high in both growth and value.

WSJ: The Intelligent Investor: The New Supercharged Index Funds

Unlike their ETF predecessors, which typically provided passive exposure to a particular index of stocks, bonds or other asset class, this fund changes its weightings (in other ETFs) based on momentum in the market.

FORBES: Taking A Smoother Ride In An ETF That Makes Market Timing Calls

That then fed into the stockmarkets - the MIB index of stocks in Milan surged by 5.6%, while Madrid rose 6%, the biggest jump in two years, led by an explosive rise in bank shares.

BBC: Equity markets stay strong despite economic uncertainty