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FRM Part I · FRM Exam Part I · Swaps

A 3-year annual-pay interest rate swap has discount factors of 0.97 (1 year), 0.94 (2 years) and 0.91 (3 years). What is the par swap rate (annual compounding)?

The par swap rate is one minus the final discount factor divided by the sum of the discount factors: 0.09 divided by 2.82, or about 3.19%. This makes the fixed leg's present value equal the floating leg's value at par. Ignoring the annuity weighting gives wrong results.

  1. A3.19%Correct
  2. B3.00%
  3. C3.30%
  4. D4.71%

Explanation

Par swap rate = (1 - DF3) / sum of DFs = (1 - 0.91) / (0.97 + 0.94 + 0.91) = 0.09 / 2.82 = 3.19%. Dividing 0.09 by 3 gives 3.00%, which ignores discounting of the fixed payments. Using (1/0.91 - 1)/3 gives 3.30%. Omitting the final DF from the annuity gives 4.71%.

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