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LONDON – Portfolio investors’ oil positions are showing significant week-to-week volatility as traders struggle to anticipate the net impact of an economic slowdown amid exceptionally low inventories in crude oil and diesel.

Source: Reuters
Hedge funds and other money managers bought the equivalent of 33 million barrels in the top six oil futures and options contracts in the week ended Oct. 25.
In the last four weeks there have been two large purchases (+62 million…