The Associated Press

Among the premarket stories for Tuesday, April 6, from AP Financial News:

¿ Shares of Massey Energy tumbled in premarket trading following news that an explosion at the company's Upper Big Branch mine in West Virginia killed 25 workers, marking the worst U.S. mining disaster in more than two decades.

¿ Shares of Huron Consulting Group Inc. rose in premarket trading as a Baird analyst said the consultancy has successfully retained more important executives than he had expected.

¿ A Baird analyst downgraded Genpact Ltd. shares, citing a recent run-up in stock price and limited prospects for increased profit margins.

¿ An analyst cut his rating on Jack in the Box Inc., saying the restaurant operator's stock is fairly valued given weak sales results.
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