Microsoft could announce a write-off of a big part of its 2013 Nokia acquisition as early as Wednesday.

The write-off was first signaled in late April, when Microsoft warned investors that the smartphone division was at an “elevated risk of impairment.”

“Impairment” is a term used to describe the situation when the market value of a business is less than what’s carried on the books. In such scenarios, corporations are required to balance accounts by taking a non-cash charge to the tune of the difference.

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