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Zombie oil fields; Jeff Immelt's "Industrial Internet;" Microsoft edges out Apple

U.S. stocks (^DJI, ^GSPC, ^IXIC) are pushing higher in midday trading, on track to snap a three-day losing streak. 

Here are some of the other stories we're keeping an eye on today at Yahoo Finance:

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Zombie oil fields

Low oil prices are hitting the energy sector. And the recent crash is forcing many U.S. shale companies to shutter their doors, creating dozens of oil and gas "zombies."

Industrial internet's booming business

How is the technology behind Uber driving the industrial space now? GE CEO Jeff Immelt is banking on what he calls the "Industrial Internet"— and he says it's worth trillions of dollars.

Microsoft's big blow to Apple

Microsoft just beat its rival tech giant to the punch in a big way. The company's digital personal assistant, Cortana, is now available on Apple iOS, Android, and Cyanogen OS devices while Apple’s Siri is stuck on just the iPhone and iPad. Will this give Microsoft a competitive advantage over Apple?