** Shares of freight transport company Knight-Swift Transportation KNX.N marginally up after UBS upgrades to "buy" from "neutral"

** Brokerage views KNX as the best‑positioned among truckload peers to benefit from rising rates and attrition in truckload supply

** Adds that the acceleration in monthly attrition, which commenced in October, provides visibility to supply reduction, while the step up in truckload spot rates from December also provides evidence of a tightening market

** UBS also raises PT to $66 from $54, a 26% upside to the stock's last close

** 15 of 21 analysts rate stock "strong buy" or "buy", five "hold" and one "sell"; their median PT is $64 - data compiled by LSEG

** Including session's move, KNX down 0.6% YTD