Margins on bond futures go up today.

The Chicago Board of Trade said that, until further notice, initial margins on bond futures will be $3,250 per $100,000 contract, up from $3,000. Also, maintenance and hedging margins will be increased to $3,000 per contract from $2,000. Margins on options on bond futures will rise as well. The increases were put into effect because of the continued volatility in the bond futures market, a CBT spokesman said.