BUZZ — Bernstein lifts Quanta to 'outperform' on grid expansion
* Bernstein upgrades energy contractor Quanta Services to "outperform" from "market perform"; lifts price target to $775 from $748 * New PT implies an upside of 22% from the stock's last close * Shares are up 0.6% at $638.70 premarket * Brokerage says co is well-positioned as the grid build-out nears an inflection poin