POSSIBLE CHANGES IN TRADING CURBS: Federal regulators are considering changing the rules for when a dramatic shift in the stock market's value triggers exchanges to cut off trading. The Securities and Exchange Commission put proposed changes in so-called circuit breakers out for public comment.
SMALLER DECLINE TRIGGERS, SHORTER HALTS: Circuit breakers automatically halt trading if the market falls by certain percentages. The SEC wants smaller market declines to trigger halts, but it also wants to shorten the stoppages.
REDUCED VOLATILITY SOUGHT: SEC Chairman Mary Schapiro said the proposed changes in circuit breakers are intended to reduce "extraordinary volatility" in the market.