Tagged Questions
3
votes
0answers
105 views
Fitting a non linear AR + GARCH(1,1)-M model
I want to fit the following model to a time series:
$$
y_{t}=\alpha_{0}+\alpha_{1}y_{t-1}+\alpha_{2}y_{t-1}^{2}+\lambda h_{t}+\varepsilon_{t}
$$
$$
...
4
votes
1answer
153 views
How to use Newey West covariance corrector?
I have implemented the following model:
daily_vol(t+1) = A*daily_vol(t) + B*weekly_vol(t) + C*monthly_vol(t) + error
where vol means volatility, and A, B, C are ...
2
votes
2answers
124 views
Squared and Absolute Returns
I've always wondered why do one use squared or absolute returns to determine if volatility modeling is required for the return series? We understand that there are various tests for its ...
4
votes
0answers
142 views
Asymmetric Volatility Modeling (Interpretation)
I am currently writing a paper on asymmetric volatility modeling of brent, gold, silver, wheat, soybean and corn from 1986-2012 and divided them into 4 sub-sample periods (i.e. 1986-1991, 1991-1997, ...
1
vote
1answer
165 views
Why does $\hat{\epsilon}'\hat{\epsilon}$ of a factor model measure risk?
$\hat{\epsilon}'\hat{\epsilon}$ from the market model: $R_{it} - \hat{\alpha} - \hat{\beta}R_{mt} = \hat{\epsilon}$, or from a factor model such as the Fama-French 3 factor model, is often used in the ...
1
vote
0answers
98 views
Unsystematic/Idiosyncratic/Firm-specific volatility/variance in the market model?
I was asked to use idiosyncratic volatility as a regressor in a cross-sectional regression upon cross-sectional returns as the dependent variable. Returns can be thought of as the raw log stock return ...
10
votes
2answers
586 views
How to forecast expected volatility from high-frequency equity panel data?
I'm wading through the vast sea of literature on realized volatility estimation and expected volatility forecasting (see, e.g. Realized Volatility by Andersen and Benzoni, which cites 120 other ...
3
votes
1answer
991 views
How to estimate a multivariate GJR or TARCH model in Eviews?
How do I specify the GARCH/TARCH equation in Eviews 6 in the variance regressors frame, if I want to find out whether there are volatilty spillovers from stock markets A and B to stock market C?
P.S. ...
11
votes
5answers
5k views
Why are GARCH models used to forecast volatility if residuals are often correlated?
The answers to this question on forecast assessment suggest that if the sequence of residuals from the forecast are not properly independent, then the model is missing something and further changes ...
