The rouble is a petrocurrency. Crude oil is a quarter of Russian exports, the largest component. Brent, still the international benchmark for oil, has risen by a fifth in the past two months. Despite that, Russia’s currency has sunk nearly as much against the dollar. On Monday alone it lost some 2 per cent. One might expect the two to move more in tandem.
盧布是一種石油貨幣。原油占俄羅斯出口的四分之一，是最大組成部分。仍是國際油價基準的布倫特原油(Brent crude)在過去兩個月上漲了五分之一。盡管如此，俄羅斯貨幣對美元的匯率近乎下跌了相同幅度。盧布僅周一就走低約2%。人們本來也許會預計盧布更加緊密地跟隨油價。
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