"All varieties of onions... Can be exported without any MEP," Directorate General of Foreign Trade (DGFT) said in a notification.
MEP is the rate below which no trader is allowed to export. The rise in MEP restricts exports and improves domestic supply.
In August, the government had hiked onion MEP to USD 700 per tonne, from USD 425, as prices at both wholesale and retail levels skyrocketed on lower output due to unseasonal rains.
Also earlier this month, the government had slashed the minimum export price (MEP) on onions to USD 400 per tonne from USD 700 to encourage outbound shipments of the commodity.
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Later in an official statement, the Commerce Ministry said the government reviewed the Minimum Export Price (MEP) of onion yesterday.
"Keeping in view of sharp decline in wholesale prices of onion in producing mandies of Maharashtra and major consuming mandies and huge arrivals of onion, the government decided to reduce the MEP to 'Zero' from USD 400 per tonne," it said.
In a tweet, Commerce and Industry Minister Nirmala Sitharaman said: "Notification issued by the DGFT removing the minimum export price for onion exports will help farmers realise better price".