When downstream processors around the world placed orders after the quick upturn in the economy, demand unexpectedly out-stripped supply for a time, and competition between buyers sent prices spiraling upward. Inevitably, the price rises were also bolstered by such factors as speculation in international futures markets, and investors at large blindly pursuing high prices in the expectation of continued price rises.
沒想到景氣迅速轉好，全球的下游廠商都來訂購時，一時間供不應求，買者競價的結果，價格扶搖直上；其中難免也夾雜著國際期貨市場的人為炒作、投資大眾預期看漲、盲目的追高價格等助漲因素。