How can policymakers influence the dollar and the trade imbalance?
Core argument: Policy options for influencing the dollar fall into four overlapping categories: acting on the current account, acting on the financial account, monetary policy, and coordinated global policies addressing saving-investment balances alongside exchange rates.
The policy options for impacting the dollar fall into four categories, though there is overlap between these. First, acting on the current account (e.g., policies to impact imports and exports). Second, acting on the financial account (a Tobin tax, restrictions on financial inflows, or accumulation of foreign assets, for example.) Third, monetary policy (a dovish Fed and/or higher inflation target). Fourth, coordinated global policies to impact saving-investment balances along side exchange rates (e.g., fiscal consolidation to lower domestic saving alongside real exchange adjustment). It’s worth bearing in mind the driver of the US current account is the saving-investment balance of the economy as a whole—or low saving rate including due to loose fiscal policy. As such, any policy can only impact the external imbalance if it leads to a change in aggregate saving-investment decisions for the US economy as a whole or that of trading partners.

