UPDATE 1-Market Chatter -- Corporate finance press digest

(Adds item on Indianbulls Financial)

Aug 18 (Reuters) - The following corporate finance-related stories were reported by media on Wednesday:

* The business group controlled by billionaire Anil Ambani is in talks to acquire a 26 percent stake in Indian Commodity Exchange from Indiabulls Financial Services Ltd (IBUL.BO), the Business Standard said on Wednesday. [ID:nSGE67H02Q]

* China Huaneng Group, the nation's biggest electricity producer, is in advanced talks to buy a 50 percent stake in U.S.-based power utility InterGen NV for about $1.2 billion, Bloomberg reported, citing two people with knowledge of the matter. [ID:nTOE67H01E]

* Windstream Corp agreed to acquire Q-Comm Corp, a privately held fiber-optic network operator, in a deal worth $515 million in cash and stock, the Wall Street Journal reported in its online edition.

* Medical device company Stryker Corp (SYK.N) is in advanced talks to buy Boston Scientific Corp's (BSX.N) pain-management device unit for about $1.5 billion, Bloomberg reported. [ID:nN17154065] (Compiled by Juhi Arora in Bangalore; Editing by David Holmes)