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White knight

A white knight is a friendly investor who comes to the rescue of a distressed business often in response to a hostile takeover offer.

Expanded Definition

Warren Buffett is perhaps the most famous practitioner of the white knight bid alive today. An example of one of his white knight style bids would be his recent bid on Constellation Energy. During the week of September 18th 2008, Constellation's stock fell 39% in a single day followed by a 19% down day on concerns that they would not be able to raise capital. Buffett then swooped in with a bid that was ultimately accepted about a 10% premium.

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