Higher charges, especially for trading, could cause global wholesale banks' risk-weighted assets to balloon by one-fifth on average, reckons Huw van Steenis of Morgan Stanley.

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This arguably makes the market more efficient, especially for securities with higher levels of trading volume.

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Main Street investors trading for their own accounts should be especially careful about buying on margin into these lows.

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"Often the 1099-Bs don't match trading logs, " he says, especially for frequent traders.

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The New York exchanges are set to reopen Wednesday, which should make for a much more active trading day, especially as Wednesday is also the last trading day of the month.

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Look for a more active trading day Friday, and especially in the immediate aftermath of the jobs report.

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Banning futures trading would do little to curb prices, especially for commodities like edible oils that are heavily imported.

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Higher prices in COF have meant lower ratings for the stock, especially since Capital One Financial has been trading in bear market territory since early August.

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Without the separation, it could be easy for your trading strategy to overcome your investment strategy, especially if you start to lose money and you put in even more resources to make up for lost ground.

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Thain has attempted to work out a hybrid model that promotes greater use of electronic trading, especially among the most liquid stocks, while preserving a role for the floor.

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