compounding = Simple, Continuous, Annual, Semiannual, EveryFourthMonth, Quarterly, Bimonthly, Monthly, SimpleThenAnnual, SimpleThenSemiannual, SimpleThenEveryFourthMonth, SimpleThenQuarterly, SimpleThenBimonthly, or SimpleThenMonthly -- This option specifies the compounding type for the given interest rate.

daycounter = a name representing a supported day counter (e.g. ISDA, Simple) or a day counter data structure created using the DayCounter constructor -- This option provides a day counter that will be used to convert the period between two dates to a fraction of the year.

evaluationdate =  a string containing a date specification in a format recognized by ParseDate or a Date data structure -- This option specifies the evaluation date. By default this is set to the global evaluation date (see EvaluationDate).

tolerance = positive constant -- This option specifies the required absolute precision of the returned result. The default value is 1e-9.

maxiterations = positive integer -- This option specifies the maximum number of iterations that can be performed  to obtain the result. When the maximum number of iterations has been reached, but InternalRateOfReturn cannot guarantee the requested accuracy of the result, an error will be thrown. The default value is 100000 iterations.

guess = positive constant -- This option can be used to specify the initial guess.

The InternalRateOfReturn command calculates the internal rate of return of a set of cash flows or a bond. This is the rate at which the present value of the set of cash flows or the bond is equal to the given price. For bonds the internal rate of return is the same as the yield (see YieldFromCleanPrice and YieldFromDirtyPrice).

$\mathrm{with}\left(\mathrm{Finance}\right)\:$

$\mathrm{SetEvaluationDate}\left(''Jan-01-2005''\right)\:$

$\mathrm{paymentdate1}≔''Jan-02-2007''$

$\mathrm{paymentdate1}≔''Jan-02-2007''$

$\mathrm{cashflow1}≔\mathrm{SimpleCashFlow}\left(100\,\mathrm{paymentdate1}\right)$

$\mathrm{cashflow1}≔\mathrm{100.\; on\; January\; 2,\; 2007}$

$\mathrm{value1}≔\mathrm{NetPresentValue}\left(\mathrm{cashflow1}\,0.05\right)$

$\mathrm{value1}≔90.47134762$

$\mathrm{InternalRateOfReturn}\left(\mathrm{cashflow1}\,\mathrm{value1}\right)$

$0.05000000001$

$\mathrm{InternalRateOfReturn}\left(\mathrm{cashflow1}\,\mathrm{value1}\,\mathrm{guess}=0.02\,\mathrm{maxiterations}=5\right)$

Error, (in Finance:-InternalRateOfReturn) maximum number of function evaluations (5) exceeded

$\mathrm{InternalRateOfReturn}\left(\mathrm{cashflow1}\,90\right)$

$0.05260819182$

$\mathrm{nominalamt}≔100$

$\mathrm{nominalamt}≔100$

$\mathrm{rate}≔0.05$

$\mathrm{rate}≔0.05$

$\mathrm{paymentdate2}≔''Jan-01-2015''$

$\mathrm{paymentdate2}≔''Jan-01-2015''$

$\mathrm{startdate2}≔''Jan-01-2006''$

$\mathrm{startdate2}≔''Jan-01-2006''$

$\mathrm{enddate2}≔''Jan-01-2010''$

$\mathrm{enddate2}≔''Jan-01-2010''$

$\mathrm{coupon2}≔\mathrm{FixedRateCoupon}\left(\mathrm{nominalamt}\,\mathrm{rate}\,\mathrm{startdate2}\,\mathrm{enddate2}\,\mathrm{paymentdate2}\right)$

$\mathrm{coupon2}≔\mathrm{20.\; on\; January\; 1,\; 2015}$

$\mathrm{value2}≔\mathrm{NetPresentValue}\left(\mathrm{coupon2}\,0.07\right)$

$\mathrm{value2}≔9.931706076$

$\mathrm{InternalRateOfReturn}\left(\mathrm{coupon2}\,\mathrm{value2}\right)$

$0.06999999998$

$\mathrm{bond}≔\mathrm{FixedCouponBond}\left(100\,5\,\mathrm{Years}\,0.05\right)$

$\mathrm{bond}≔\mathbf{module}\left(\right)\mathbf{end\; module}$

$\mathrm{npv}≔\mathrm{NetPresentValue}\left(\mathrm{bond}\,0.03\right)$

$\mathrm{npv}≔108.9396460$

$\mathrm{YieldFromDirtyPrice}\left(\mathrm{bond}\,\mathrm{npv}\right)$

$0.02999999994$

$\mathrm{InternalRateOfReturn}\left(\mathrm{bond}\,\mathrm{npv}\right)$

$0.02999999994$

The Finance[InternalRateOfReturn] command was introduced in Maple 15.

For more information on Maple 15 changes, see Updates in Maple 15.