Top Analyst Upgrades and Downgrades (AMSC, SOLR, MRO, MIPI, SUN, TSO, TIF, UPS, VLO, ZION)
These are this Thursday’s top analyst upgrades, downgrades, and initiations seen in Wall Street research calls: American Superconductor Corporation (NASDAQ: AMSC) Raised to Buy at Deutsche Bank. GT Solar International, Inc. (NASDAQ:…