Backed by exceptionally tight supplies and concerns that dry weather could reduce next year's harvest, Vietnamese coffee prices hit record highs this week.

Robusta coffee for delivery in May was $92, or 2.7%, on Wednesday at $3,467 per metric ton. The traders offered 5% of black and broken Robusta of quality 2 at a premium of 600 to 620 dollars per ton compared to the May contract. Sumatra Robusta coffee beans from Indonesia for the April contract were offered at a premium of $720, down from $820 in premium last week