** Shares of specialty equipment provider Custom Truck One Source CTOS.N dip 5.5% to $5.7 premarket

** J.P.Morgan downgrades stock rating to "underweight" from "neutral" and trims PT to $5.50 from $6

** JPM anticipates vocational truck sales to soften over the coming quarters on the back of weak orders data in recent months

** "We also expect TES (truck and equipment sales) profitability to come under pressure with existing tariffs and a possible Section 232 announcement later this year or early next year" - JPM

** Six analysts rate the stock "buy" on average; their median PT is $8 - data compiled by LSEG

** YTD, CTOS up 25.3%

(Reporting by Joel Jose in Bengaluru)

((joeljose@thomsonreuters.com;))