WALTHAM, Mass. (AP) _ Tesaro Inc. (TSRO) on Thursday reported a loss of $166.7 million in its second quarter.

On a per-share basis, the Waltham, Massachusetts-based company said it had a loss of $3.04.

The results did not meet Wall Street expectations. The average estimate of nine analysts surveyed by Zacks Investment Research was for a loss of $2.66 per share.

The biopharmaceutical company posted revenue of $57.2 million in the period, also falling short of Street forecasts. Nine analysts surveyed by Zacks expected $64.5 million.

Tesaro expects full-year revenue in the range of $250 million to $265 million.

Tesaro shares have decreased 57 percent since the beginning of the year. In the final minutes of trading on Thursday, shares hit $35.28, a fall of 72 percent in the last 12 months.

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This story was generated by Automated Insights (http://automatedinsights.com/ap) using data from Zacks Investment Research. Access a Zacks stock report on TSRO at https://www.zacks.com/ap/TSRO