Media-measurement giant Nielsen says it has turned down a bid by a private equity consortium, after reports of a potential acquisition caused its stock to soar (Brian Steinberg/Variety)

Brian Steinberg / Variety:
Media-measurement giant Nielsen says it has turned down a bid by a private equity consortium, after reports of a potential acquisition caused its stock to soar  —  Nielsen Holdings PLC has turned down a bid by a private-equity consortium to buy the media-measurement giant …