Robusta coffee prices, which reached a 15-year high in May, are expected to remain tight until next year due to low supplies, particularly from Asia. Despite Brazil's optimistic export prospects for the second half of the year, traders believe that even its maximum forecasted exports of 3 million bags might not be sufficient to cover the shortfall. The situation is worsened by Vietnam's depleting stocks and anticipated disappointing crop from Indonesia, the world's largest and second largest exporters of Robusta, respectively. The USDA expects a 20% drop in Indonesia's production and Vietnam's exports to hit a three-year low. The increased demand for Robusta, which is cheaper and can be used as a substitute in blends, also contributes to the high prices.