Higher US yields send Aussie sliding February 26, 2021SharePrint Australian dollar falls below 78 line What a difference one short day can make in the currency markets. It was just yesterday that the red-hot Australian dollar crossed above the 80-level for the first time since February 2018. The Aussie was once again treating its US counterpart as a punching bag, posting impressive gains of 4.3% in the month of February. The US dollar index has been weakening, and on Thursday the index fell below 90, an important support level in recent weeks. This drop could have signaled that the US dollar was headed even lower.