currency hedging is an important component of investing. my reference currency is the CHF and I usually hedge my usd exposure with FX forwards. based on my personal assessment of the foreign currency, I hedge up to 100% so that I have no foreign currency exposure. At the moment I've hedged around 50% of the USD exposure. On the positive side, the hedging costs are low at present because of the interest rates (CHF and USD interest rates are about the same).