New York-listed Navigator Holdings was one of the few gainers in an otherwise down day for shipping stocks, rising over 11% largely thanks to an upgrade on the stock to "outperform" from Wells Fargo.

Shipping analyst Michael Webber said Navigator's fleet, some 34 handy and mid-size refrigerated and semi-refrigerated gas carriers, gives it "unique leverage to the early innings of a broader petchem and LPG export recovery trade."

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