How much do exchange rates move in response to tariff news?
Core argument: U.S. tariff news in 2018–19 appreciated the dollar by about 1% and depreciated the renminbi by about 2%, measured using ten-minute-frequency nominal effective exchange rates over horizons of a few hours.
We look at how the dollar and the renminbi responded to [high-frequency] tariff-related news in 2018-19. We construct nominal effective exchange rates (NEERs) for the US dollar and the renminbi at the ten-minute frequency and measure the impact of tariff news on these effective exchange rates at time horizons of a few hours. This exercise is model-free. Bloomberg News Search was used to identify news related to the tariff war between the US and China and record the exact time of their release.. We find that the US tariff news that occurred in 2018-19 appreciated the dollar by about one percent and depreciated the renminbi by two percent. The third row of Fig. 3 shows that the renminbi significantly depreciates following news of an increase in US tariffs,statistically significant for all time windows. The impact of news about US tariffs is about three times larger for the renminbi than for the dollar.






