freq - Coupon payments per year (annual = 1, semiannual = 2; quarterly = 4).
basis - [optional] Day count basis (see below, default =0).
Some bonds have an irregular first or last period, so interest payments don't fit a normal schedule. To calculate the yield of a bond with an irregular last period, you can use the ODDLYIELD function. The ODDLYIELD function returns the yield of a security with a short or long last period as a percentage.
In the example shown, we want to calculate the yield of a bond with a last interest date of 15-Oct-2017 and a settlement date of 5-Feb-2018. The bond matures on 15-Jun-2018, and pays a coupon rate of 5%. Payments are semi-annual, the day count basis is US 30/360, and the redemption value is $100. In the example shown, the formula in F5 is:
With these inputs, the ODDLYIELD function returns 6.32%, with percentage number format applied.
In Excel, dates are serial numbers. Generally, the best way to enter valid dates is to use cell references, as shown in the example. To enter valid dates directly inside a function, the DATE function is the best option. To illustrate, the formula below has all values hardcoded, with the DATE function used to enter the three required dates:
The basis argument controls how days are counted. The ODDLYIELD function allows 5 options (0-4) and defaults to zero, which specifies US 30/360 basis. This article on wikipedia provides a detailed explanation of available conventions.
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