TBILLYIELD

Returns the yield for a Treasury bill.

If this function is not available, and returns the #NAME? error, install and load the Analysis ToolPak add-in.

ShowHow?

  1. On the Tools menu, click Add-Ins.
  2. In the Add-Ins available list, select the Analysis ToolPak box, and then click OK.
  3. If necessary, follow the instructions in the setup program.

Syntax

TBILLYIELD(settlement,maturity,pr)

 Important   Dates should be entered by using the DATE function, or as results of other formulas or functions. For example, use DATE(2008,5,23) for the 23rd day of May, 2008. Problems can occur if dates are entered as text.

Settlement     is the Treasury bill's settlement date. The security settlement date is the date after the issue date when the Treasury bill is traded to the buyer.

Maturity     is the Treasury bill's maturity date. The maturity date is the date when the Treasury bill expires.

Pr     is the Treasury bill's price per $100 face value.

Remarks

  • Microsoft Excel stores dates as sequential serial numbers so they can be used in calculations. By default, January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,448 days after January 1, 1900. Microsoft Excel for the Macintosh uses a different date system as its default.
  • Settlement and maturity are truncated to integers.
  • If settlement or maturity is not a valid date, TBILLYIELD returns the #VALUE! error value.
  • If pr ≤ 0, TBILLYIELD returns the #NUM! error value.
  • If settlement ≥ maturity, or if maturity is more than one year after settlement, TBILLYIELD returns the #NUM! error value.
  • TBILLYIELD is calculated as follows:

Equation

where:

DSM = number of days from settlement to maturity, excluding any maturity date that is more than one calendar year after the settlement date.

Example

The example may be easier to understand if you copy it to a blank worksheet.

ShowHow to copy an example

  1. Create a blank workbook or worksheet.
  2. Select the example in the Help topic.

 Note   Do not select the row or column headers.

Selecting an example from Help

Selecting an example from Help
  1. Press CTRL+C.
  2. In the worksheet, select cell A1, and press CTRL+V.
  3. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
 
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A B
Data Description
March 31, 2008 Settlement date
June 1, 2008 Maturity date
98.45 Price per $100 face value
Formula Description (Result)
=TBILLYIELD(A2,A3,A4) The yield, for the treasury bill with the terms above (0.091417 or 9.1417 percent)
 
 
Applies to:
Excel 2003