China Sky One Medical ( CSY), which develops over-the-counter nutritional and medicinal products, forecast second-quarter earnings of $6.4 million, or 43 cents a share. One analyst polled by Thomson Reuters expects 43 cents a share. The stock shot up 16.5% to $15.85.

Finally, Interoil ( IOC), an oil and gas company, climbed 10% to $31.20. The Cairns, Australia company announced positive gas flow results at its Elk-4/Antelope structure. The new data from the site continues to surpass pre-drill expectations, the company said.

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