"Trading activities were tepid as weak London prices discouraged Vietnamese farmers from offloading stocks," said a trader based in the Central Highlands.
Local farmers have already sold most of their output and are not willing to sell at low prices, he added.
Another trader, also based in the region, said there were virtually no transactions in the past two weeks. Traders in Vietnam offered the 5% black and broken grade 2 robusta at a $250 premium per tonne to the November contract, compared with a range of $220-$250 premium a week ago. Coffee exports from Vietnam are expected to fall an estimated 10.3% in the first eight months of this year from a year earlier to 1.19 million tonnes, equal to 19.8 million 60-kg bags, official data released on Thursday showed.