fwd2zero
Zero curve given forward curve
In R2017b, 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 new optional name-value pair inputs:
InputCompounding
, InputBasis
,
OutputCompounding
, and
OutputBasis
.
Syntax
Description
[
returns a zero curve given an implied forward rate curve and its maturity dates. If
both inputs for ZeroRates
,CurveDates
] = fwd2zero(ForwardRates
,CurveDates
,Settle
)CurveDates
and Settle
are
strings or date character vectors, CurveDates
is returned as
serial date numbers. However, if either of the inputs for
CurveDates
and Settle
are a datetime
array, CurveDates
is returned as a datetime array.
[
adds optional name-value pair argumentsZeroRates
,CurveDates
] = fwd2zero(___,Name,Value
)
Examples
Compute the Zero Curve Given the Forward Curve Using datetime Inputs
This example shows how to use datetime
inputs compute the zero curve, given an implied forward rate curve over a set of maturity dates, a settlement date, and a compounding rate.
ForwardRates = [0.0469 0.0519 0.0549 0.0535 0.0558 0.0508 0.0560 0.0545 0.0615 0.0486]; CurveDates = [datetime(2000,11,6) datetime(2000,12,11) datetime(2001,1,15) datetime(2001,2,5) datetime(2001,3,4) datetime(2001,4,2) datetime(2001,4,30) datetime(2001,6,25) datetime(2001,9,4) datetime(2001,11,12)]; Settle = datetime(2000,11,3); InputCompounding = 1; InputBasis = 2; OutputCompounding = 1; OutputBasis = 2; [ZeroRates, CurveDates] = fwd2zero(ForwardRates, CurveDates,... Settle,'InputCompounding',1,'InputBasis',2,'OutputCompounding',1,'OutputBasis',2)
ZeroRates = 10×1
0.0469
0.0515
0.0531
0.0532
0.0538
0.0532
0.0536
0.0539
0.0556
0.0543
CurveDates = 10x1 datetime
06-Nov-2000
11-Dec-2000
15-Jan-2001
05-Feb-2001
04-Mar-2001
02-Apr-2001
30-Apr-2001
25-Jun-2001
04-Sep-2001
12-Nov-2001
Input Arguments
ForwardRates
— Annualized implied forward rates
decimal fraction
Annualized implied forward rates, specified as a
(NUMBONDS
)-by-1
vector using
decimal fractions. In aggregate, the rates in
ForwardRates
constitute an implied forward curve
for the investment horizon represented by
CurveDates
. The first element pertains to
forward rates from the settlement date to the first curve date.
Data Types: double
CurveDates
— Maturity dates
datetime array | string array | date character vector
Maturity dates, specified as a
NUMBONDS
-by-1
vector using a
datetime array, string array, or date character vectors, that correspond to
the ForwardRates
.
To support existing code, fwd2zero
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: datetime
| string
| char
Settle
— Common settlement date for ForwardRates
datetime scalar | string scalar | date character vector
Common settlement date for ForwardRates
,
specified as scalar datetime, string, or date character vector.
To support existing code, fwd2zero
also
accepts serial date numbers as inputs, but they are not recommended.
Data Types: datetime
| string
| char
Name-Value Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Name-value 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: [ZeroRates,CurveDates] =
fwd2zero(ForwardRates,CurveDates,Settle,'InputCompounding',3,'InputBasis',5,'OutputCompounding',4,'OutputBasis',5)
InputCompounding
— Compounding frequency of input forward rates
2
(default) | numeric values: 0
,1
,
2
, 3
,
4
, 6
, 12
,
365
, -1
Compounding frequency of input forward rates, specified with allowed values:
0
— Simple interest (no compounding)1
— Annual compounding2
— Semiannual compounding (default)3
— Compounding three times per year4
— Quarterly compounding6
— Bimonthly compounding12
— Monthly compounding365
— Daily compounding-1
— Continuous compounding
Note
If InputCompounding
is not specified,
then InputCompounding
is assigned the
value specified for OutputCompounding
.
If either InputCompounding
or
OutputCompounding
are not
specified, the default is 2
Data Types: double
InputBasis
— Day-count basis of input forward rates
0
(default) | numeric values: 0
,1
,
2
, 3
,
4
, 6
, 7
,
8
, 9
,
10
, 11
,
12
, 13
Day count basis of input forward rates, specified as a numeric value. Allowed 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 InputBasis
is not specified, then
InputBasis
is assigned the value
specified for OutputBasis
. If either
InputBasis
or
Outputbasis
are not specified, the
default is 0
(actual/actual) for both.
Data Types: double
OutputCompounding
— Compounding frequency of output zero rates
2
(default) | numeric values: 0
,1
,
2
, 3
,
4
, 6
, 12
,
365
, -1
Compounding frequency of output zero rates, specified with the allowed values:
0
— Simple interest (no compounding)1
— Annual compounding2
— Semiannual compounding (default)3
— Compounding three times per year4
— Quarterly compounding6
— Bimonthly compounding12
— Monthly compounding365
— Daily compounding-1
— Continuous compounding
Note
If OutputCompounding
is not specified,
then OutputCompounding
is assigned the
value specified for InputCompounding
.
If either InputCompounding
or
OutputCompounding
are not specified,
the default is 2
(semiannual) for
both.
Data Types: double
OutputBasis
— Day-count basis of output zero rates
0
(default) | numeric values: 0
,1
,
2
, 3
,
4
, 6
, 7
,
8
, 9
,
10
, 11
,
12
, 13
Day count basis of output zero rates, specified as a numeric value. Allowed 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 OutputBasis
is not specified, then
OutputBasis
is assigned the value
specified for InputBasis
. If either
InputBasis
or
OutputBasis
are not specified, the
default is 0
(actual/actual) for both.
Data Types: double
Output Arguments
ZeroRates
— Zero curve for investment horizon represented by CurveDates
numeric
Zero curve for the investment horizon represented by
CurveDates
, returned as a
NUMBONDS
-by-1
vector of
decimal fractions. In aggregate, the rates in
ZeroRates
constitute a zero curve for the
investment horizon represented by
CurveDates
.
CurveDates
— Maturity dates that correspond to ZeroRates
datetime | serial date number
Maturity dates that correspond to the ZeroRates
,
returned as a NUMBONDS
-by-1
vector
of maturity dates that correspond to the zero rates in
ZeroRates
. This vector is the same as the input
vector CurveDates
, but is sorted by ascending
maturity.
If both inputs for CurveDates
and
Settle
are strings or date character vectors,
CurveDates
is returned as serial date numbers. Use
the function datetime
to convert serial
date numbers to formatted datetime arrays. However, if either of the inputs
for CurveDates
and Settle
are a
datetime array, CurveDates
is returned as a datetime
array.
Version History
Introduced before R2006aR2022b: Serial date numbers not recommended
Although fwd2zero
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.
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