# Questions tagged [curve-fitting]

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31 views

### Filtering options for IV surface and construction for cryptocurrencies

I'm new to quant finance and currently working on my first project.I'm trying to construct the Implied volatility surface for cryptocurrencies from deribit ( as options from deribit are the most ...
50 views

### How stable are the coefficients in the Exponential Spline model?

In the model defined below for discount function, are the Beta's relative stable from day to day? If so I might use Hessian dPdB to invert the Beta changes from benchmark price changes, and then to ...
87 views

### Curve fitting under different regions and stitching

Is there a way to fit a 2D curve under the following conditions: The curve is defined by 2 functions for x>a, and x<a Prefer a fit that is continuous and differentiable at x=a
67 views

### Implementation of solvers for curve construction

I'd be really interested to hear people's experiences of implementing global solvers for curve construction, especially with regard to how robust the approach is in practice, numerical performance, ...
28 views

### Quantifying the difference between 2 Foward Curves

I'd like to quantify the difference between 2 Foward Curves. In particular, I'd like to get a single metric which represents the magnitude of change between curve A and curve B. I'd like to plot this ...
36 views

### Comparing curve fits

I am experimenting with building a forward curve. I have a piece of code which constructs my prototype curve. I've got a curve sample which was constructed manually and I use it as the baseline - the &...
125 views

149 views

### Why do constant maturity bonds account for modified duration?

One can create a constant maturity treasury (CMT) by building a zero coupon discount curve and generating constant maturity bonds from that curve. This allows one to look further back than is possible ...
220 views

### QuantLib - Synthetic deposit/FRA rates in yield curve

In my flat forwards dollar curve implemented in QuantLib I would like to add the following instrument: Today is 12/28/2018 Pillar quote is 1% p.a. (ACT/360) Pillar start is 1/30/2019 (specific ...
199 views

### How to Parameterize a Bond Yield Curve?

Suppose I have a Bond Yield Curve (assume Semi-Annual Compounding), at term 1M, 3M... 1Y, 2Y... 10Y, 15Y ...30Y (x-axis is maturity / term). How should I parameterize this yield curve? Any ...
119 views

### Bootstrap zero curve source of information

I'm trying to understand the bootstrap methodology to construct a zero curve from a par curve in detail. I'm looking for a good source of information, preferably with a detailed example, that ...
495 views

### Corporate Bond Yield Curve

I am an intern in a mutual fund and they have asked me to create in house yield curve for different type bonds in their portfolio I need to know on what basis are different yield curves made. For ...
1k views

### Bootstrapping OIS Curve with data from different days data

I have the following problem bootstrapping the JPY OIS Curve. The bootstrapping itself works when havin one set of data, e.g. for the date 2017-02-09. I have all my instruments and as said ...
169 views

### Metrics for curve quality

When constructing curves, are there any generic and quantitative metrics that can be computed for any kind curve(government, corporate, swap, exc.. exc..)?
310 views

### SVI Parametrization: simple example does not work

I'm trying to experiment with the SVI model. I use the following scripts: ...
808 views

### QuantLib FittedBondDiscountCurve fitResults [Error]

I try to use FittedBondDiscountCurve with NelsonSiegelFitting, but I faced with error when call fitResults() method: ...
1k views

### Constructing yield curve directly from yield-to-maturity data

I'm trying to use Bloomberg yield-to-maturity data for sets of sovereign bonds of different maturities to fit to a yield curve. I looked into using the QuantLib library (the FittedBondCurve ...
256 views

### Introducing 1bp shocks to yield curve (and interpolation consequences)

Let us assume we have a LIBOR 3M curve and that I would like to introduce a small shock up/down of 1bp at a certain point along the curve. I am trying to find out what the best and most efficient way ...
906 views

### Skewed Student t distribution MLE and Simulation

I have Financial LOB data and I feel that a skewed t distribution will fit best. I have a problem trying to find the parameters using MLE numerically since Matlabs built in function does not allow for ...
1k views

### Vasicek yield curve

Term structure is determined by a two-factor affine model (Vasicek). Using the monthly swap market data, we fit the model to match exactly the one-year and ten-year points along the swap curve ...
601 views

### Cubic spline interpolation function within Matlab

I want to use the Cubic spline interpolation technique so I can interpolate yield curve points. Now I wonder if I can use the standard matlab function interpl1 (and then using the 'spline' method) or ...
230 views

### Yield curve interpolation at (very) short horizons

I'm struggling to find much information about yield curve interpolation for sub-yearly horizons. Say, one-two months. It seems to be the area where the curvature is usually nontrivial, while after ...
863 views

### Kolmogorov-Smirnov test for Generalized Pareto Distribution

I've fitted my data to a generalized pareto distribution as to model the returns in the tails more accurately. The interior is fitted with kernel distributions. I would like to now test whether the ...
156 views

### forecasting crash time of KLSE index (1991-1994)

Price deviation = financial bubbles. i try to fit the following stock price index to predict recession. I couldn't fit the model with the data(Data are not available in yahoo finance for the ...
6k views

### Bloomberg Zero Coupon Rates

As some of your may know from my other posts, I am working on a Dynamic Nelson Siegel (DNS) based relative value trading model. On simulated data (which satisfies all the assumptions) of the DNS it ...
201 views

### OIS discounting pre and post crises

I have a Dynamic Nelson Siegel (DNS) based rv model. I want to know if I can use pre and post-crises curves interchangeably in my calibration and out of sample testing. I.e. those without OIS ...
322 views

### Johansen-Ledoit-Sornette Model

im trying to predict crash time by using lppl model(JLS). My codes can run, but the error is to high....I try with some other initial values, but still can't reduce the error.....How i can reduce ...
181 views

### Fitting a sigmoid function to incomplete, structured, data

I have an incomplete data set that looks like this: and I believe that it will continue to form a sigmoid-like shape. How can fit a sigmoid curve to this data given my assumption about what the ...
386 views

### Parameters for numerically fitting t-distribution to log-returns

I am fitting the t-distribution to log-returns numerically (not using R, MATLAB, Stata, etc.), but rather using general programming. Assuming the log-return values are $r_t$, and the $t$-variates are ...
8k views

### Algorithm to fit AR(1)/GARCH(1,1) model of log-returns

I am fitting numerically an AR(1)/GARCH(1,1) process to index and stock log-returns, $r_t=\log(P_t/P_{t-1})$, where $P_t$ is the price at time $t$, and thus far am not clear on where the observed log ...
91 views

### How to choose a window for curve fitting and prediction?

I am using Pareto distribution to fit a serie of survival rates (with least square). My ultimate goal is to use this fitting curve for prediction. Thus I would mainly focus on the tail of the ...