Texas Instruments Calculator User Manual page 99

M1
where: =month of first date
DT
1 =day of first date
Y
1 =year of first date
M
2 =month of second date
DT
2 =day of second date
Y
2 =year of second date
MB
=base month (January)
DB
=base day (1)
YB
=base year (first year after leap year)
30/360 day-count method
Note: The method assumes 30 days per month and 360 days per year.
(
= –
DBD Y2
M
where: 1 =month of first date
DT
1 =day of first date
Y
1 =year of first date
M
2 =month of second date
DT
2 =day of second date
Y
2 =year of second date
DT
Note: If 1 is 31, change
DT
change 2 to 30; otherwise, leave it at 31.
3. Source for 30/360 day-count method formula: Lynch, John J., Jr., and Jan H. Mayle.
Standard Securities Calculation Methods. New York: Securities Industry Association,
1986
Appendix — Reference Information
3
Y1 ) × (
+
360 M2
DT
1 to 30. If
M1 ) × (
+ +
30
DT
2 is 31 and
DT1 )
–
DT2
DT
1 is 30 or 31,
95