Hawaiian Electric Industries Inc.'s second quarter earnings tumbled more than 70 percent after the company's bank subsidiary took a $35.6 million charge.

HEI earned $5.1 million, or 6 cents a share, during the three months ending June 30, which was down from $17.5 million, or 21 cents per share, in the year-earlier period.

Shares of HEI were down 2 cents to $24.20 on the New York Stock Exchange today.

In June, HEI's American Savings Bank subsidiary took a one-time, $35.6 million, or 42 cents per share, charge as part of a balance sheet restructuring plan. The restructuring included the sale of about $1 billion in government-backed mortgage securities.