** Sulzer shares surge on huge volumes and are poised for their biggest single-day move since May 2010.
** Stock is best performer and easily the most actively traded stock on the STOXX 600
** Company says overnight that it was in merger talks with Dresser-Rand
** Dresser-Rand shares spiked 7.2% in the U.S. suggesting shareholders of both companies would favour a deal.
** Sulzer got about a fifth of its revenue from the U.S. in 2013. Chart: link.reuters.com/baw82w (RM: email@example.com)