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"We covered when the Board fired the CEO before he could turn the company into a penny stock," Einhorn wrote in the letter.
It's trading higher in the wake of the news.
JCPenney's stock was last trading up about 2% in today's session.
The struggling retailer is the stock that activist investor Bill Ackman has been publicly cheerleading for over the past couple of years.
So far, Ackman, who has has 17.74% stake in JCPenney, has taken a bath betting on the retailer.
Bloomberg