Additional increases could hurt the leveraged funds more than other bond funds.
Additional increases could pressure the Bush administration to push for lower prices before the next meeting of OPEC in September.
Prices for May are expected to top $300 a ton, and some producers have announced additional increases for the summer.
Owners of rent-controlled and rent-stabilized buildings can apply for additional increases for major elevator upgrades.
They said additional increases could follow through the spring and into summer if the economy did not slow.
FedEx said its outlook for the new fiscal year "assumes no additional increases to current fuel prices and no further weakening in the economy".
Under the formula, federal workers would have received a 2.7percentt raise, and workers in many areas, including most big cities, would have received substantial additional increases.
Health and care should be on a flat, inflation-proofed budget until 2020 with any additional increases coming from new revenue sources.
Staff members will receive a 4percentt pay raise this year, with additional increases of 4.2, 4.4 and 4.5percentt in the contract's remaining years.
Mr. Frey said that additional increases in postage would be likely this year because of the recent spike in gas prices.
This is an expansionary change in fiscal policy that won't require additional increases in the national debt.
