This is "Journalese". No one else actually speaks like this. Anyway, to shed means to cast off (like a snake sheds its skin). Here, it is used figuratively to mean the trade figure diminished by 0.9% in that time.
May 15, 2016
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In this case "shed" means "lose"
A loss.
A reduction.
我失去了3元
May 15, 2016
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