咖啡的主产地巴西5月份天气寒冷，交易商担心会出现扭冻，遂提前在期货市场进行大量购买．从而导致国际市场咖啡价格上涨。预计这一上涨势头不会持续多久，但是7月份巴西是否遭到四冻的消息明确之前咖啡价格会继续上涨。1999年4月下旬，巴西南部遭受寒流袭击，市场人士担心巴西 Brazil, the main coffee producing country, was cold in May, with traders worried about the possibility of a flashback and a large purchase ahead of the futures market. As a result, the price of coffee in the international market has risen. The upward trend is not expected to last long, but the price of coffee will continue to rise until news of whether the country was frozen in July is clear. In late April 1999, southern Brazil was hit by cold spell, and market participants worried about Brazil