TBILLEQ

Returns the bond-equivalent yield for a Treasury bill.

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

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

Syntax

TBILLEQ(settlement,maturity,discount)

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.

Discount is the Treasury bill's discount rate.

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, TBILLEQ returns the #VALUE! error value.
If discount ≤ 0, TBILLEQ returns the #NUM! error value.
If settlement > maturity, or if maturity is more than one year after settlement, TBILLEQ returns the #NUM! error value.
TBILLEQ is calculated as TBILLEQ = (365 x rate)/(360-(rate x DSM)), where DSM is the number of days between settlement and maturity computed according to the 360 days per year basis.

Example

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

Show How?

Create a blank workbook or worksheet.
Select the example in the Help topic. Do not select the row or column headers.

Selecting an example from Help
Press CTRL+C.
In the worksheet, select cell A1, and press CTRL+V.
To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

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A	B
Data	Description
March 31, 2008	Settlement date
June 1, 2008	Maturity date
9.14%	Percent discount rate
Formula	Description (Result)
=TBILLEQ(A2,A3,A4)	The bond equivalent yield, for the Treasury bill with the terms above (0.094151 or 9.42%)

Note To view the number as a percent, select the cell and click Cells on the Format menu. Click the Number tab, and then click Percentage in the Category box.