On 14 May and 15 May 1997, the Thai baht was hit by massive speculative attacks. On 30 June 1997, Prime Minister Chavalit Yongchaiyudh said that he would not devalue the baht. This was the spark that ignited the Asian financial crisis as the Thai government failed to defend the baht, which was pegged to the basket of currencies in which the U.S. dollar was the main component, against international speculators.