Upgrades:

Twitter (TWTR) upgraded to Buy from Hold at Pivotal Research Group, target $42

Google (GOOG) upgraded to Buy from Hold at Pivotal Research Group, target $610

Downgrades:

Verizon (VZ) downgraded to Neutral from Buy at Goldman, target lowered to $48 from $55

Other:

General Electric (GE) target lowered to $28 from $30 at RBC Capital Mkts

American Express (AXP) initiated with a Overweight at Morgan Stanley, target $110

3M (MMM) target raised to $190 from $164 at BofA/Merrill