Investment Analysts’ upgrades for Tuesday, May 31st: Amundi (OTCMKTS:AMDUF) was upgraded by analysts at Keefe, Bruyette & Woods from a market perform rating to an outperform rating. Aperam (OTCMKTS:APEMY) was upgraded by analysts at Morgan Stanley from an equal weight rating to an overweight rating. China Gas (OTCMKTS:CGHLY) was upgraded by analysts at Daiwa Capital […]