** Shares of office real estate investment trust Postal Realty Trust PSTL.N up nearly 1% at $20 premarket
** BMO upgrades rating to "outperform" from "market perform", lifts price target to $23 from $21
** New PT implies an upside of 15.7% to the stock's last close
** Brokerage says PSTL is seeing improving income growth from a shift to stronger leases, higher rent increases as contracts reset, and modest margin gains
** Adds co stands to benefit from the USPS's ongoing reliance on leased facilities and stable government backing
** Says highly fragmented ownership base supports long-term growth opportunities for PSTL
** Five of 6 brokerages rate the stock "buy" or higher, one "hold"; their median PT is $23- data compiled by LSEG
** As of last close, stock had risen 23.2% YTD
(Reporting by Apratim Sarkar in Bengaluru)
((Apratim.Sarkar@thomsonreuters.com))