Archive for the ‘Stable Distributions’ Category
Daily S&P 500 Value-at-Risk Estimates
A few people have commented about the methodology used to produce the charts in my last post. Keep in mind, I threw those together quickly for Felix based on charts already put together for a seminar at UCLA. If you want to see what I actually look at on a regular basis, I put the following chart together:
This is the 99%, 1-day VaR using a weighting scheme that places more weight on the most recent data.
Again, note the divergence between the two charts in recent months. Risk systems (like most third party vendors) based on normal distributions are likely indicating that risk continues to decrease. However, the stable distribution indicates the opposite, i.e. risk has begun increasing again.
