This story has been updated to clarify the seat availability comparisons to the prior year.
This story has been updated to reflect the more accurate number of employees at Verisk working on weather risk management.
This article has been corrected to reflect that Michael Bloomberg defended high-frequency trading and dark pools.
This version corrected that the plan to reduce the danger would separate volatile gases from crude before the oil is loaded onto tanker cars.
An earlier version of this story misstated the name of the medical college that was supported by Sandy Weill.
This article has been updated to show that U.S. employers planned to cut payrolls by 40,298 in April.
This version corrected the year Lay and Skilling were convicted to 2006.
This version corrected the spelling of the last name of JMP Securities' Alex Gauna.
This version corrected that Caterpillar stock rose in premarket trading.