DERIVATIVES
AIM: Proposed rules seek to prevent another blowup in that market
IMPACT: Companies may pay extra for basic contracts

COMMODITIES
AIM: To stop speculators, regulators have limited holdings
IMPACT: Individuals have fewer investment choices

HIGH-FREQUENCY TRADING
IM: Lawmakers may curb trading firms that use superfast computers
IMPACT: The cost of retail trading could rise

Data: BusinessWeek

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