** Shares of solar and battery company Canadian Solar CSIQ.O down 2.5% at $25.7 after Mizuho downgrades rating to "underperform" from "outperform"

** Brokerage raises price target to $21 from $15

** New PT represents a downside of 20.5% to the stock's last close

** Brokerage says the rally already prices in battery and solar growth, while U.S. factory uncertainty makes valuation look stretched

** Co forecasts flat solar shipments but battery storage nearly doubling in 2026 - Mizuho

** Brokerage says Co plans to sell recurrent assets instead of holding them, signaling financing challenges

** 3 of 12 brokerages rate the stock "buy" or higher, 5 "hold" and 4 "sell" or lower, median PT is $17 - data compiled by LSEG

** Including session's move, shares up 137.6% YTD

(Reporting by Varun Sahay)

((Varun.sahay@thomsonreuters.com))