The board of Aetna Inc. has agreed to let managers spend another $750 million on repurchasing shares of the company’s common stock.

Aetna, Hartford (NYSE:AET), has about $257 million in stock repurchase authority left from an earlier allocation.

Aetna will “continue buying shares in the open market from time to time,” the company says.

Aetna has about 400 million shares of stock outstanding, and those shares have a total market value of about $12 billion.

- Allison Bell