Ethanol stocks have tightened for five weeks in a row.

The U.S. Energy Information Administration says the domestic supply is the tightest since last November at 22.041 million barrels, a decrease of 1.15 million on the week and 1.671 million on the year.

That’s due to improving demand as the retailers prepare for summer driving season and the ethanol industry gets ready for expanded E15 access.

The drawdown included a significant week-to-week decline at the Gulf, which could be a sign of new export demand.

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