The US dollar traded lower against almost all of its major peers on Tuesday, as investors once again began favouring riskier assets amid encouraging news of progress towards multiple COVID-19 vaccines.There is now real optimism that high risk groups in some of the major developed nations could begin receiving inoculations within the next few weeks. This could spell an end to lockdown restrictions and a return to something closer to normality in many countries by spring 2021. While a vaccine will not trigger an overnight return to normal levels of economic activity, investors can see light at the end of the tunnel and have begun unwinding some of their safe-haven flows and instead buying those currencies deemed as higher risk.Among the major currencies, the euro jumped above the 1.19 level this morning - only the third time it has done so since the beginning of September. The traditional greater risk Aussie and New Zealand dollars have also leapt higher so far this week, with the latter now trading at its strongest position since June 2018. The Thanksgiving holiday in the US this week has created a period of relatively thin liquidity trading, as investors step away from their desks to spend time with families. That is likely at least part of the reason why we’re seeing such volatile moves in FX in the last few days relative to the previous couple of weeks, as has tended to be the case during Thanksgiving holiday weeks in the past. Revised third quarter GDP data out of the US this afternoon is unlikely to rock the boat. We will instead be looking towards tonight’s FOMC meeting minutes as one of the likely main movers today.