Shares in Anworth Mortgage Asset Corp. closed down nearly 8 percent Monday as investors ditched the tumbling stock as it sets to report its fourth quarter earnings.

Shares in the Santa Monica-based lender have sank 35 percent since being downgraded by investment firm Keefe Bruyette. The firm is worried Anworth will have to carry more capital to cope with uncertainties in the market, hurting its ability to invest and grow.

Shares in Anwroth closed down 7.5 percent to $5.55 in trading Monday. Shares have lost one third of their value this year.

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