** Morgan Stanley upgrades payments firm Block XYZ.N to "overweight" from "equal weight" rating

** Brokerage says XYZ has an attractive valuation opportunity and potential for better cost savings

** Brokerage raises PT to $67 from $65, a ~15.7% upside on stock's last close

** 36 of 45 brokerages rate the stock "buy" or higher, seven "hold" and two "sell"; their median PT is $92.67 - LSEG data

** Including session's moves, stock down ~35.8% YTD

(Reporting by Prakhar Srivastava in Bengaluru)

((Prakhar.srivastava2@thomsonreuters.com))