# Tagged Questions

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### Why is Weighted Least Squares necessary in fundamental factor model?

Why is Weighted Least Squares necessary in fundamental factor model while it is not in a standard Macroeconomic factor model? I understand that $\mathbb{E}[\epsilon^2_{it}]=\sigma_i^2$ varies across ...
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### Interplay of statistical factors (PCA) and market factors (value, momentum, low vol, …)

Is there any research done on the interplay between statistical factors (as a result of principle component analysis PCA) and the market factors (especially value, size, low vol, momentum, quality)? ...
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### Estimating factor returns with linearly dependent loadings

Given an $n\times 1$ vector of asset returns $r$, and a $n\times k$ matrix of factor loadings $X$, we can express the asset returns in terms of as-yet-unknown factors $f$ using $$r = Xf + \epsilon$$...
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### Fama-French Factors for ETFs and MFs

Is there a public source or a paid service that provides FF3 (or FF4 = "Carhart") factor loadings for US traded ETFs and Mutual Funds? Something that is regularly updated and that provides comparable ...
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### Variable Selection with Kalman Filter

I'm trying to estimate factor loadings on portfolios over time for portfolios that are traded pretty frequently. I have a sense that several portfolios are loading on the Fama-French HML factor ...
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### Practical Implications of Fama French Loadings

Suppose you have historical returns for a portfolio. You regress these against the Fama French factors to get the loadings/coefficients. How can you use this information? For example, can you use the ...
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### Constructing Dedicated Risk Premia Strategies

I am trying to figure out the "best" way to construct investment strategies which are focused on capturing specific risk premia individually. From my understanding the traditional approach to capture ...