Arbitraging a mispriced forward loan

The 1-year spot rate is 3%3\% and the 2-year spot rate is 5%5\% (annual compounding). A dealer will lock in a 1-year loan that starts one year from now at a fixed rate of 6.00%6.00\%. This rate is off-market, so you can arbitrage it. What riskless profit (in dollars, to two decimals) can you lock in per $1{,}000 of the forward loan, realized at year 2?

Show hints (2)+
  1. Fair forward: (1+s2)2=(1+s1)(1+f)(1+s_2)^2=(1+s_1)(1+f), so f=(1.05)2/1.03−1f=(1.05)^2/1.03-1.
  2. Profit per $1{,}000 =1000×(f−0.06)=1000\times(f-0.06) at year 2.

Answer

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10.39 (± 0.1)

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