Roll yield is when you are hedging your asset for question 5. you are long CHF. if CHF is trading at a premium and you want to hedge CHF aka you want to sell CHF forward you have a positive roll yield calculated as
Just remember that the roll yield relationship (positive if future is below spot and negative if future is below spot) holds true for currencies if you are buying the base currency. If you are instead buying the price currency then the relationship is inverse.
If roll yield is positive then it reduces your hedging costs (vice versa). However, even if you earn a roll yield of say 3%, if you expect the unhedged return to be 5% you should leave unhedged.
Roll yield (Spot - Future)/Spot. Essentially the return you solidy if you enter into a forward contract right now and the futures price converges to the spot price at expiration (assuming no change in SPOT).
Roll Yield for currencies is (F-S)/S. Don’t get mixed up with commodities. The perspectives are different for commodities and currencies. In most cases we are buying commodity hedges whereas with currencies we are generally hedging our exposure by selling forward. That’s the perspective you see a majority of the time in the CFAI questions.
Well you can’t base your hedging decision on the roll yield alone. You should first look at the forecasted exchange rates which will most likely be provided and then you should decide whether to hedge or not. Remember, the roll yield is the same thing as the hedged currency return.