Cloud Peak Energy Inc shares are currently trading off about 2% on the day.

FORBES: Shares of CLD Now Oversold

Cloud Peak Energy Inc shares are currently trading off about 2.7% on the day.

FORBES: CLD Stock Crowded With Sellers

California power officials had declared a Stage Two electrical emergency for the fourth day in a row on Thursday, asking residents to turn off Christmas lights during peak usage times.

CNN: California briefly declares Stage Three power emergency