Vietnamese coffee prices slightly decreased this week, following global trends, due to the start of harvest in Brazil. However, prices in Indonesia were unpredictable. Vietnam's coffee exports in May saw a significant decrease of 47.8% compared to the previous month. As a result, prices did not drop as much as expected. The market is sluggish with some traders opting for peppers over coffee. Indonesian Sumatra robusta beans for July deliveries had a reduced premium this week, while another trader quoted a higher premium compared to the previous week, highlighting the market's volatility.