2
votes
1answer
217 views

Robust Returns-Based Style Analysis

Sharpe's Return-Based Style Analysis is an interesting theory but flawed in practice when working with long-short funds or funds that are changing strategies over shorter periods of time due to the ...
1
vote
1answer
219 views

How to use financial ratios in a factor model?

I am trying to understand how factor loadings in a general factor model are computed. For simplicity sake, lets assume a simple model: $$ R = B \times F + \epsilon $$ $$ R = N \times 1 $$ $$ B = N ...
2
votes
1answer
155 views

Combining covariances?

Consider an economy with assets with return processes $A$, $B$, $C$, $D$. Consider a weighted index with return process $I=aA + bB + cC + dD$ where $a,b,c,d$ are coefficients, and $a+b+c+d = 1$. ...
8
votes
1answer
2k views

Which approach to estimating fundamental factor models is better, cross-sectional (unobservable) factors or time-series (observable) factors?

There are many approaches to estimating fundamental factor equity models. I would like to focus on two traditional methods: The time-series regression approach of Fama and French. Factors are ...