Shares of TransEnterix Inc. rocketed 53% on heavy volume toward an 18-month high, after the medical device company received regulatory clearance to market its robotic surgery device. Volume spiked to more than 35 million shares, compared with the full-day average of about 1.9 million shares, and enough to make the stock the most actively traded on the major U.S. exchanges. The company said late Friday that the Food and Drug Administration have marketing clearance to its Senhance System that gives surgeons a 3-D high-definition view of the surgical field and remote control of three robotic arms to perform procedures. The stock has now nearly tripled over the past three months, while the S&P 500 has gained 3.9%.
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