T-Yield v1.0, function set for Russ Webb's RPN
Functions for Estimating Yields on Treasury Securities
Copyright (c) 1997 by Marvin E. Wilborne III

Overview
--------

This function set extension for Russ Webb's RPN calculator (which is
seperately registered shareware:  http://kale.ee.cornell.edu/pilot/) allows
you to compute yields on T-Bills using the Discount Yield Method and the
Investment Yield Method.  It also allows you to calculate the Investment
Yield of Treasury Notes and Bonds that are held to maturity.

For detailed information about how these calculations take place, take a
look at the included file in this distribution:  yieldinf.txt or go to this
web site http://www.banx.com/banx/treasury/yieldcal.htm.

Installation
------------

To install the T-Yield functions, simply extract the included PDB file from
the ZIP file and use the Palm Pilot Install Tool to install, and then HotSync
to get the functions loaded.  You should already have Russ Webb's RPN
calculator installed before installing these functions.

Operation
---------

The function set adds the following buttons on the RPN button palette:

FV      Press this button after entering Future Value to store it.

PP      Press this button after entering Present Value to store it.

M       This value can be days or years depending on which yield you're
        calculating.

R       Store the current value on the stack as the rate used by calculations
        for computing the investment yield on treasury notes and bond

DY      Compute the Discount Yield using the values stored with FV, PP and M.

IY	Compute the Investment Yield using the values stored with FV, PP and
	M.  This function automatically determines if the current year is a
	leap year and uses the appropriate number of days, 365 or 366 for the
	calculations.

NBY	Compute the Investment Yield using the values store with FV, PP, M
	and R.

%	Convert the result from a decimal percentage to a percentage (i.e.
	multiply the answer on the stack by 100).

?	Display registration information.


			Example (taken from yieldinf.txt)

Enter	Display
-----	-------
10000	10000.000000
FV	----
9659.3	9659.300000
PP	----
182	182.000000
M	----
DY	0.067391	(6.74%)

IY	0.070737	(7.07%)


Registration
------------

This function set is Shareware.  You can download it and use it for 30 days
without registering.  If you continue to use it after 30 days, please
register by sending $5.00 to:

        Marvin E. Wilborne III
        124 Matthew Circle
        Danville, VA 24540

Or you can register on-line at PilotGear's Shopping Mall:
        http://www2.viaweb.com/pilotgearsw/

Or you can call PilotGear at 800-741-9070.

If you've already registered a RPN function set that I've developed, then
you're already registered for these.  I call it cross registering.

Address comments or questions by e-mail to:

	wilborne@gamewood.net

Legal Notice
------------
This software is copyrighted (c) 1997 by Marvin E. Wilborne III. Furthermore,
I make  no warranty with respect to the quality of this software, nor do I
warrant that its operation will be error-free. The author claims no liability
for data loss or any other problems caused directly or indirectly by use of
this application.

This function set may be freely distributed provided that this file is
included with the PDB file that contains the functions.