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The market regulator imposed trading curbs between August and December 2008 in an attempt to halt the slide, but the measures had little effect.
The stock market regulator imposed trading curbs between August and December 2008 to attempt to halt the slide but the measures had little effect.
In January, the US Commodity Futures Trading Commission proposed to limit speculation, with trading curbs on physically and financially settled crude, natural gas, heating oil and gasoline futures and options contracts.