Exchange operators often raise so-called margin requirements at times of large market swings.

WSJ: Gold Plummets to Two-Year Low

As the deadline approached, supporters pressure the agency for more time while critics said the ship's operators had been given plenty of time to meet the same requirements imposed on other vessels.

NPR: Deal Requires Ferry To Stop Ash Dumping In 2 Years

High up-front investment requirements combined with uncertainty about what types of wireless multimedia services customers will want "are valid reasons for operators to be very cautious" when paying for licenses, according to a Lehman Brothers report.

CNN: Stuck On the Runway

Plus, software providers need to evolve to become data center operators a different type of business, with more demanding, time-sensitive requirements than simply servicing their own staffs.

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