cfamounts
Cash flow and time mapping for bond portfolio
Syntax
Description
[
returns matrices of cash flow amounts, cash flow dates, time factors, and cash flow
flags for a portfolio of CFlowAmounts
,CFlowDates
,TFactors
,CFlowFlags
,CFPrincipal
] = cfamounts(CouponRate
,Settle
,Maturity
)NUMBONDS
fixedincome securities.
The elements contained in the cfamounts
outputs for the cash
flow matrix, time factor matrix, and cash flow flag matrix correspond to the cash
flow dates for each security. The first element of each row in the cash flow matrix
is the accrued interest payable on each bond. This accrued interest is zero in the
case of all zero coupon bonds. cfamounts
determines all cash
flows and time mappings for a bond whether or not the coupon structure contains odd
first or last periods. All output matrices are padded with NaN
s
as necessary to ensure that all rows have the same number of elements.
[
adds optional namevalue arguments. CFlowAmounts
,CFlowDates
,TFactors
,CFlowFlags
,CFPrincipal
] = cfamounts(___,Name,Value
)
Examples
Compute the Cash Flow Structure and Time Factors for a Bond Portfolio
This example shows how to compute the cash flow structure and time factors for a bond portfolio that contains a corporate bond paying interest quarterly and a Treasury bond paying interest semiannually.
Settle = '01Nov1993'; Maturity = ['15Dec1994';'15Jun1995']; CouponRate= [0.06; 0.05]; Period = [4; 2]; Basis = [1; 0]; [CFlowAmounts, CFlowDates, TFactors, CFlowFlags] = ... cfamounts(CouponRate,Settle, Maturity, Period, Basis)
CFlowAmounts = 2×6
0.7667 1.5000 1.5000 1.5000 1.5000 101.5000
1.8989 2.5000 2.5000 2.5000 102.5000 NaN
CFlowDates = 2×6
728234 728278 728368 728460 728552 728643
728234 728278 728460 728643 728825 NaN
TFactors = 2×6
0 0.2404 0.7403 1.2404 1.7403 2.2404
0 0.2404 1.2404 2.2404 3.2404 NaN
CFlowFlags = 2×6
0 3 3 3 3 4
0 3 3 3 4 NaN
Compute the Cash Flow Structure and Time Factors for a Bond Portfolio and Return a datetime array for CFlowDates
This example shows how to compute the cash flow structure and time factors for a bond portfolio that contains a corporate bond paying interest quarterly and a Treasury bond paying interest semiannually and CFlowDates
is returned as a datetime array.
Settle = datetime(1993,11,1);
Maturity = [datetime(1994,12,15) ; datetime(1995,6,15)];
CouponRate= [0.06; 0.05];
Period = [4; 2];
Basis = [1; 0];
[CFlowAmounts, CFlowDates, TFactors, CFlowFlags] = cfamounts(CouponRate,...
Settle, Maturity, Period, Basis)
CFlowAmounts = 2×6
0.7667 1.5000 1.5000 1.5000 1.5000 101.5000
1.8989 2.5000 2.5000 2.5000 102.5000 NaN
CFlowDates = 2x6 datetime
01Nov1993 15Dec1993 15Mar1994 15Jun1994 15Sep1994 15Dec1994
01Nov1993 15Dec1993 15Jun1994 15Dec1994 15Jun1995 NaT
TFactors = 2×6
0 0.2404 0.7403 1.2404 1.7403 2.2404
0 0.2404 1.2404 2.2404 3.2404 NaN
CFlowFlags = 2×6
0 3 3 3 3 4
0 3 3 3 4 NaN
Compute the Cash Flow Structure and Time Factors for a Bond Portfolio Using Optional NameValue Pairs
This example shows how to compute the cash flow structure and time factors for a bond portfolio that contains a corporate bond paying interest quarterly and a Treasury bond paying interest semiannually. This example uses the following NameValue pairs for Period
, Basis
, BusinessDayConvention
, and AdjustCashFlowsBasis
.
Settle = '01Jun2010'; Maturity = ['15Dec2011';'15Jun2012']; CouponRate= [0.06; 0.05]; Period = [4; 2]; Basis = [1; 0]; [CFlowAmounts, CFlowDates, TFactors, CFlowFlags] = ... cfamounts(CouponRate,Settle, Maturity, 'Period',Period, ... 'Basis', Basis, 'AdjustCashFlowsBasis', true,... 'BusinessDayConvention','modifiedfollow')
CFlowAmounts = 2×8
1.2667 1.5000 1.5000 1.5000 1.5000 1.5000 1.5000 101.5000
2.3077 2.4932 2.5068 2.4932 2.5000 102.5000 NaN NaN
CFlowDates = 2×8
734290 734304 734396 734487 734577 734669 734761 734852
734290 734304 734487 734669 734852 735035 NaN NaN
TFactors = 2×8
0 0.0778 0.5778 1.0778 1.5778 2.0778 2.5778 3.0778
0 0.0769 1.0769 2.0769 3.0769 4.0769 NaN NaN
CFlowFlags = 2×8
0 3 3 3 3 3 3 4
0 3 3 3 3 4 NaN NaN
Use cfamounts
With a CouponRate
Schedule
This example shows how to use cfamounts
with a CouponRate
schedule. For CouponRate
and Face
that change over the life of the bond, schedules for CouponRate
and Face
can be specified with an NINST
by1 cell array, where each element is a NumDates
by2 matrix where the first column is dates and the second column is associated rates.
CouponSchedule = {[datenum('15Mar2012') .04;datenum('15 Mar 2013') .05;... datenum('15 Mar 2015') .06]}
CouponSchedule = 1x1 cell array
{3x2 double}
cfamounts(CouponSchedule,'01Mar2011','15Mar2015' )
ans = 1×10
1.8453 2.0000 2.0000 2.0000 2.5000 2.5000 3.0000 3.0000 3.0000 103.0000
Use cfamounts
With a Face
Schedule
This example shows how to use cfamounts
with a Face
schedule. For CouponRate
and Face
that change over the life of the bond, schedules for CouponRate
and Face
can be specified with an NINST
by1 cell array, where each element is a NumDates
by2 matrix where the first column is dates and the second column is associated rates.
FaceSchedule = {[datenum('15Mar2012') 100;datenum('15 Mar 2013') 90;... datenum('15 Mar 2015') 80]}
FaceSchedule = 1x1 cell array
{3x2 double}
cfamounts(.05,'01Mar2011','15Mar2015', 'Face', FaceSchedule)
ans = 1×10
2.3066 2.5000 2.5000 12.5000 2.2500 12.2500 2.0000 2.0000 2.0000 82.0000
Use cfamounts
to Generate the Cash Flows for a Sinking Bond
This example shows how to use cfamounts
to generate the cash flows for a sinking bond.
[CFlowAmounts,CFDates,TFactors,CFFlags,CFPrincipal] = cfamounts(.05,'04Nov2010',... {'15Jul2014';'15Jul2015'},'Face',{[datenum('15Jul2013') 100;datenum('15Jul2014')... 90;datenum('15Jul2015') 80]})
CFlowAmounts = 2×11
1.5217 2.5000 2.5000 2.5000 2.5000 2.5000 12.5000 2.2500 92.2500 NaN NaN
1.5217 2.5000 2.5000 2.5000 2.5000 2.5000 12.5000 2.2500 12.2500 2.0000 82.0000
CFDates = 2×11
734446 734518 734699 734883 735065 735249 735430 735614 735795 NaN NaN
734446 734518 734699 734883 735065 735249 735430 735614 735795 735979 736160
TFactors = 2×11
0 0.3913 1.3913 2.3913 3.3913 4.3913 5.3913 6.3913 7.3913 NaN NaN
0 0.3913 1.3913 2.3913 3.3913 4.3913 5.3913 6.3913 7.3913 8.3913 9.3913
CFFlags = 2×11
0 3 3 3 3 3 13 3 4 NaN NaN
0 3 3 3 3 3 13 3 13 3 4
CFPrincipal = 2×11
0 0 0 0 0 0 10 0 90 NaN NaN
0 0 0 0 0 0 10 0 10 0 80
Input Arguments
CouponRate
— Annual percentage rate used to determine coupons payable on a bond
decimal
Annual percentage rate used to determine the coupons payable on a bond,
specified as decimal using a scalar or a
NBONDS
by1
vector.
CouponRate
is 0
for zero coupon
bonds.
Note
CouponRate
and Face
can change
over the life of the bond. Schedules for CouponRate
and Face
can be specified with an
NBONDS
by1
cell array, where
each element is a NumDates
by2
matrix or cell array, where the first column is dates (serial date
numbers or character vectors) and the second column is associated rates.
The date indicates the last day that the coupon rate or face value is
valid. This means that the corresponding CouponRate
and Face
value applies "on or before" the specified
ending date.
Data Types: double
 cell
 char
Settle
— Settlement date of bond
datetime array  string array  date character vector
Settlement date of the bond, specified as a scalar or a
NBONDS
by1
vector using a
datetime array, string array, or date character vectors. The
Settle
date must be before the
Maturity
date.
To support existing code, cfamounts
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: char
 string
 datetime
Maturity
— Maturity date of bond
datetime array  string array  date character vector
Maturity date of the bond, specified as a scalar or a
NBONDS
by1
vector using a
datetime array, string array, or date character vectors.
To support existing code, cfamounts
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: char
 string
 datetime
NameValue Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Namevalue arguments must appear after other arguments, but the order of the
pairs does not matter.
Before R2021a, use commas to separate each name and value, and enclose
Name
in quotes.
Example: [CFlowAmounts, CFlowDates, TFactors, CFlowFlags] = ...
cfamounts(CouponRate,Settle,
Maturity,'Period',4,'Basis',3,'AdjustCashFlowsBasis',true,'BusinessDayConvention','modifiedfollow')
Period
— Number of coupon payments per year for bond
2
(default)  numeric with values 0
, 1
,
2
, 3
, 4
,
6
or 12
Number of coupon payments per year for the bond, specified as the
commaseparated pair consisting of 'Period'
and a
scalar or a NBONDS
by1
vector
using the values: 0
, 1
,
2
, 3
, 4
,
6
, or 12
.
Data Types: double
Basis
— Daycount basis of bond
0
(default)  numeric values: 0
,1
,
2
, 3
, 4
,
6
, 7
, 8
,
9
, 10
, 11
,
12
, 13
Daycount basis of the bond, specified as the commaseparated pair
consisting of 'Basis'
and a scalar or a
NBONDS
by1
vector using a
supported value:
0 = actual/actual
1 = 30/360 (SIA)
2 = actual/360
3 = actual/365
4 = 30/360 (PSA)
5 = 30/360 (ISDA)
6 = 30/360 (European)
7 = actual/365 (Japanese)
8 = actual/actual (ICMA)
9 = actual/360 (ICMA)
10 = actual/365 (ICMA)
11 = 30/360E (ICMA)
12 = actual/365 (ISDA)
13 = BUS/252
For more information, see Basis.
Data Types: double
EndMonthRule
— Endofmonth rule flag
1
(in effect) (default)  nonnegative integer 0
or
1
Endofmonth rule flag, specified as the commaseparated pair
consisting of 'EndMonthRule'
and a scalar or a
NBONDS
by1
vector. This rule
applies only when Maturity
is an endofmonth date
for a month having 30 or fewer days.
0
= Ignore rule, meaning that a bond coupon payment date is always the same numerical day of the month.1
= Set rule on, meaning that a bond coupon payment date is always the last actual day of the month.
Data Types: logical
IssueDate
— Bond issue date
datetime array  string array  date character vector
Bond issue date (the date the bond begins to accrue interest),
specified as the commaseparated pair consisting of
'IssueDate'
and a scalar or a
NBONDS
by1
vector using a
datetime array, string array, or date character vectors. The
IssueDate
cannot be after the
Settle
date.
If you do not specify an IssueDate
, the cash flow
payment dates are determined from other inputs.
To support existing code, cfamounts
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: char
 string
 datetime
FirstCouponDate
— Irregular or normal first coupon date
datetime array  string array  date character vector
Irregular or normal first coupon date, specified as the
commaseparated pair consisting of 'FirstCouponDate'
and a scalar or a NBONDS
by1
vector using a datetime array, string array, or date character vectors.
If you do not specify a FirstCouponDate
, the cash
flow payment dates are determined from other inputs.
Note
When FirstCouponDate
and
LastCouponDate
are both specified, the FirstCouponDate
takes
precedence in determining the coupon payment structure. If
FirstCouponDate
is not specified, then
LastCouponDate
determines the coupon
structure of the bond.
To support existing code, cfamounts
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: char
 string
 datetime
LastCouponDate
— Irregular or normal last coupon date
datetime array  string array  date character vector
Irregular or normal last coupon date, specified as the commaseparated
pair consisting of 'LastCouponDate'
and a scalar or a
NBONDS
by1
vector using a
datetime array, string array, or date character vectors.
Note
When FirstCouponDate
and
LastCouponDate
are both specified, the
FirstCouponDate
takes precedence in
determining the coupon payment structure. If
FirstCouponDate
is not specified, then
LastCouponDate
determines the coupon
structure of the bond.
To support existing code, cfamounts
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: char
 string
 datetime
StartDate
— Forward starting date of coupon payments
datetime array  string array  date character vector
Forward starting date of coupon payments after the
Settle
date, specified as the commaseparated
pair consisting of 'StartDate'
and a scalar or a
NBONDS
by1
vector using a
datetime array, string array, or date character vectors.
Note
To make an instrument forward starting, specify
StartDate
as a future date.
If you do not specify a StartDate
, the effective
start date is the Settle
date.
To support existing code, cfamounts
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: char
 string
 datetime
Face
— Face value of bond
100
(default)  numeric
Face value of the bond, specified as the commaseparated pair
consisting of 'Face'
and a scalar or a
NBONDS
by1
vector.
Note
CouponRate
and Face
can
change over the life of the bond. Schedules for
CouponRate
and Face
can
be specified with an
NBONDS
by1
cell array
where each element is a
NumDates
by2
matrix or
cell array, where the first column is dates (serial date numbers or
character vectors) and the second column is associated rates. The
date indicates the last day that the coupon rate or face value is
valid. This means that the corresponding
CouponRate
and Face
value applies "on or before" the specified ending date.
When the corresponding Face
value is used to
compute the coupon cashflow on the specified ending date. Three
things happen on the specified ending date:
The last coupon corresponding to the current
Face
value is paid.The principal differential (between the current and the next
Face
value) is paid.The date marks the beginning of the period with the next
Face
value, for which the cashflow does not occur until later.
Data Types: double
 cell
 char
AdjustCashFlowsBasis
— Adjusts cash flows according to accrual amount based on actual period day count
false
(default)  logical with a value of true
or
false
Adjusts cash flows according to the accrual amount based on the actual
period day count, specified as the commaseparated pair consisting of
'AdjustCashFlowsBasis'
and a scalar or a
NBONDS
by1
vector.
Data Types: logical
BusinessDayConvention
— Business day conventions
'actual'
(default)  character vector with values'actual'
,
'follow'
, 'modifiedfollow'
,
'previous'
or
'modifiedprevious'
Business day conventions, specified as the commaseparated pair
consisting of 'BusinessDayConvention'
and a scalar or
NBONDS
by1
cell array of
character vectors of business day conventions to be used in computing
payment dates. The selection for business day convention determines how
nonbusiness days are treated. Nonbusiness days are defined as weekends
plus any other date that businesses are not open (for example, statutory
holidays). Values are:
'actual'
— Nonbusiness days are effectively ignored. Cash flows that fall on nonbusiness days are assumed to be distributed on the actual date.'follow'
— Cash flows that fall on a nonbusiness day are assumed to be distributed on the following business day.'modifiedfollow'
— Cash flows that fall on a nonbusiness day are assumed to be distributed on the following business day. However if the following business day is in a different month, the previous business day is adopted instead.'previous'
— Cash flows that fall on a nonbusiness day are assumed to be distributed on the previous business day.'modifiedprevious'
— Cash flows that fall on a nonbusiness day are assumed to be distributed on the previous business day. However if the previous business day is in a different month, the following business day is adopted instead.
Data Types: char
 cell
CompoundingFrequency
— Compounding frequency for yield calculation
SIA uses2
, ICMA uses
1
(default)  integer with value of 1
, 2
,
3
, 4
, 6
, or
12
Compounding frequency for yield calculation, specified as the
commaseparated pair consisting of
'CompoundingFrequency'
and a scalar or a
NBONDS
by1
vector. Values are:
1
— Annual compounding2
— Semiannual compounding3
— Compounding three times per year4
— Quarterly compounding6
— Bimonthly compounding12
— Monthly compounding
Note
By default, SIA bases
(0
7
) and
BUS/252
use a semiannual compounding
convention and ICMA bases
(8
12
) use an annual
compounding convention.
Data Types: double
DiscountBasis
— Basis used to compute the discount factors for computing the yield
SIA uses 0
(default)  integers of the set [0...13]
 vector of integers of the set [0...13]
Basis used to compute the discount factors for computing the yield,
specified as the commaseparated pair consisting of
'DiscountBasis'
and a scalar or a
NBONDS
by1
vector. Values
are:
0 = actual/actual
1 = 30/360 (SIA)
2 = actual/360
3 = actual/365
4 = 30/360 (PSA)
5 = 30/360 (ISDA)
6 = 30/360 (European)
7 = actual/365 (Japanese)
8 = actual/actual (ICMA)
9 = actual/360 (ICMA)
10 = actual/365 (ICMA)
11 = 30/360E (ICMA)
12 = actual/365 (ISDA)
13 = BUS/252
For more information, see Basis.
Note
If a SIA daycount basis is defined in the
Basis
input argument and there is no
value assigned for DiscountBasis
, the default
behavior is for SIA bases to use the
actual/actual
day count to compute
discount factors.
If an ICMA daycount basis or BUS/252
is
defined in the Basis
input argument and
there is no value assigned for DiscountBasis
,
the specified bases from the Basis
input
argument are used.
Data Types: double
Holidays
— Dates for holidays
holidays.m
used (default)  datetime array  string array  date character vector
Dates for holidays, specified as the commaseparated pair consisting
of 'Holidays'
and a
NHOLIDAYS
by1
vector using a
datetime array, string array, or date character vectors. Holidays are
used in computing business days.
To support existing code, cfamounts
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: char
 string
 datetime
PrincipalType
— Type of principal when a Face
schedule is specified
sinking
(default)  character vector with values 'sinking'
or
'bullet'
Type of principal when a Face
schedule,
specified as the commaseparated pair consisting of
'PrincipalType'
and a value of
'sinking'
or 'bullet'
using a
scalar or a NBONDS
by1
vector.
If 'sinking'
, principal cash flows are returned
throughout the life of the bond.
If 'bullet'
, principal cash flow is only returned
at maturity.
Data Types: char
 cell
Output Arguments
CFlowAmounts
— Cash flow amounts
matrix
Cash flow amounts, returned as a
NBONDS
byNCFS
(number of cash
flows) matrix. The first entry in each row vector is the accrued interest
due at settlement. This amount could be zero, positive or negative. If no
accrued interest is due, the first column is zero. If the bond is trading
excoupon then the accrued interest is negative.
CFlowDates
— Cash flow dates for a portfolio of bonds
matrix
Cash flow dates for a portfolio of bonds, returned as a
NBONDS
byNCFS
matrix. Each row
represents a single bond in the portfolio. Each element in a column
represents a cash flow date of that bond.
If all the above inputs (Settle
,
Maturity
, IssueDate
,
FirstCouponDate
,
LastCouponDate
, and StartDate
)
are either strings s or date character vectors, then
CFlowDates
is returned as a serial date number. Use
the function datestr
to convert serial
date numbers to formatted date character vectors. If any of these inputs are
datetime arrays, then CFlowDates
is returned as a
datetime array.
TFactors
— Matrix of time factors for a portfolio of bonds
matrix
Matrix of time factors for a portfolio of bonds, returned as a
NBONDS
byNCFS
matrix. Each row
corresponds to the vector of time factors for each bond. Each element in a
column corresponds to the specific time factor associated with each cash
flow of a bond.
Time factors are for price/yield conversion and time factors are in units of whole semiannual coupon periods plus any fractional period using an actual day count. For more information on time factors, see Time Factors.
CFlowFlags
— Cash flow flags for a portfolio of bonds
matrix
Cash flow flags for a portfolio of bonds, returned as a
NBONDS
byNCFS
matrix. Each row
corresponds to the vector of cash flow flags for each bond. Each element in
a column corresponds to the specific flag associated with each cash flow of
a bond. Flags identify the type of each cash flow (for example, nominal
coupon cash flow, front, or end partial, or "stub" coupon, maturity cash
flow).
Flag 
Cash Flow Type 


Accrued interest due on a bond at settlement. 

Initial cash flow amount smaller than normal due to a “stub” coupon period. A stub period is created when the time from issue date to first coupon date is shorter than normal. 

Larger than normal initial cash flow amount because the first coupon period is longer than normal. 

Nominal coupon cash flow amount. 

Normal maturity cash flow amount (face value plus the nominal coupon amount). 

End “stub” coupon amount (last coupon period is abnormally short and actual maturity cash flow is smaller than normal). 

Larger than normal maturity cash flow because the last coupon period longer than normal. 

Maturity cash flow on a coupon bond when the bond has less than one coupon period to maturity. 

Smaller than normal maturity cash flow when the bond has less than one coupon period to maturity. 

Larger than normal maturity cash flow when the bond has less than one coupon period to maturity. 

Maturity cash flow on a zero coupon bond. 

Sinking principal and initial cash flow amount smaller than normal due to a "stub" coupon period. A stub period is created when the time from issue date to first coupon date is shorter than normal. 

Sinking principal and larger than normal initial cash flow amount because the first coupon period is longer than normal. 

Sinking principal and nominal coupon cash flow amount. 
CFPrincipal
— Principal cash flows
matrix
Principal cash flows, returned as a
NBONDS
byNCFS
matrix.
If PrincipalType
is 'sinking'
,
CFPrincipal
output indicates when the principal is
returned.
If PrincipalType
is 'bullet'
,
CFPrincipal
is all zeros and, at
Maturity
, the appropriate Face
value.
More About
Time Factors
Time factors help determine the present value of a stream of cash flows.
The term time factors refer to the exponent TF in the discounting equation
$$PV={\displaystyle \sum _{i=1}^{n}\left(\frac{CF}{{(1+\frac{z}{f})}^{TF}}\right)},$$
where:
PV = 
Present value of a cash flow. 
CF = 
Cash flow amount. 
z = 
Riskadjusted annualized rate or yield corresponding to a given cash flow. The yield is quoted on a semiannual basis. 
f = 
Frequency of quotes for the yield. Default is

TF = 
Time factor for a given cash flow. The time factor is
computed using the compounding frequency and the discount
basis. If these values are not specified, then the defaults
are as follows:

Note
The Basis
is always used to compute accrued
interest.
References
[1] Krgin, D. Handbook of Global Fixed Income Calculations. Wiley, 2002.
[2] Mayle, J. "Standard Securities Calculations Methods: Fixed Income Securities Formulas for Analytic Measures." SIA, Vol 2, Jan 1994.
[3] Stigum, M., Robinson, F. Money Market and Bond Calculation. McGrawHill, 1996.
Version History
Introduced before R2006aR2022b: Serial date numbers not recommended
Although cfamounts
supports serial date numbers,
datetime
values are recommended instead. The
datetime
data type provides flexible date and time
formats, storage out to nanosecond precision, and properties to account for time
zones and daylight saving time.
To convert serial date numbers or text to datetime
values, use the datetime
function. For example:
t = datetime(738427.656845093,"ConvertFrom","datenum"); y = year(t)
y = 2021
There are no plans to remove support for serial date number inputs.
R2017b: Support for optional namevalue input arguments
The specification of optional input arguments has changed. While the previous
ordered inputs syntax is still supported, it may no longer be supported in a future
release. Use the optional namevalue pair inputs: Period
,
Basis
, EndMonthRule
,
IssueDate
,FirstCouponDate
,
LastCouponDate
,
StartDate
,Face
,
AdjustCashFlowsBasis
,
BusinessDayConvention
,
CompoundingFrequency
, DiscountBasis
,
Holidays
, and PrincipalType
.
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