How much is your arbitrage profit in $ at expiration, if you know that the current exchange rate is $ 1.25 / GBP, the 60-day forward rate is $ 1.41 /GBP, the risk free rate in the U.S. is 2% and the risk free rate in the UK is 4%? Make your calculation so that the spot transaction is for $100,000. Provide your arbitrage profit in $ rounded to two decimals.
Exchange Rate = $ 1.25 / £ | |
As per Interest Rate Parity Theorem, | |
Fair Forward Rate = $ (1 + i $)/(1 + i£) | |
Fair Forward Rate = 1.25 (1 + (0.02*(60/360)))/(1 + (0.04*(60/360))) | |
Fair Forward Rate = 1.2458 | |
60-day forward rate is $ 1.41 /GBP | |
As the Actual Forward Rate is higher than fair forward Rate, Forwards are over priced hence Sell forward | |
A | If $100,000 is deposited, after 60 days, We get $100,000*2%*(60/360) = $100,333.33 |
B | Purchase £ in Spot and enter into Forward Contract |
Purchase £ with $100,000 available, We get $100,000/$1.25 = £ 80,000 | |
Deposit £ we got for 60 days, We get £ 0.9674 + Interest = 0.9746 | |
Interest = £80,000 * 4% * 60/360 = £ 80,533.33 | |
Convert £ we received to $ using Forward Rate | |
We get £80,533.33/$1.41 = $ 113,552 | |
C | Arbitrage Gain = $ 113,552 - $ 100,333.33 |
Arbitrage Gain = $ 13,218.67 |
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