Author Archives: Pat
Upcoming events
Featured I’ll be leading two courses in the near future: Value-at-Risk versus Expected Shortfall 2012 October 30-31, London. 30th: “Addressing the critical challenges and issues raised by the Basel proposal to replace VaR with Expected Shortfall” 31st: “Variability in Value-at-Risk and Expected Shortfall” led by Patrick Burns Details at CFP Events. Finance with R Workshop … Continue reading
Posted in Events, R language
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S&P 500 correlations up to date
I haven’t heard much about correlation lately. I was curious about what it’s been doing. Data The dataset is daily log returns on 464 large cap US stocks from the start of 2006 to 2012 October 5. The sector data were taken from Wikipedia. The correlation calculated here is the mean correlation of stocks among … Continue reading
US market portrait 2012 week 41
US large cap market returns. Fine print The data are from Yahoo Almost all of the S&P 500 stocks are used The initial post was “Replacing market indices” The R code is in marketportrait_funs.R
How to add a benchmark to a variance matrix
There is a good way and a bad way to add a benchmark to a variance matrix that will be used for optimization and similar operations. Our examination sheds a little light on the process of variance matrix estimation in this realm. Role of benchmarks Investing Benchmarks are common in investment management. It’s my opinion … Continue reading
Posted in Quant finance, R language
Tagged benchmark, Ledoit-Wolf shrinkage, statistical factor model, variance matrix
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US market portrait 2012 week 40
US large cap market returns. Fine print The data are from Yahoo Almost all of the S&P 500 stocks are used The initial post was “Replacing market indices” The R code is in marketportrait_funs.R
Two particular courses and other upcoming events
Featured I’ll be leading two courses in the near future: Value-at-Risk versus Expected Shortfall 2012 October 30-31, London. 30th: “Addressing the critical challenges and issues raised by the Basel proposal to replace VaR with Expected Shortfall” 31st: “Variability in Value-at-Risk and Expected Shortfall” led by Patrick Burns Details at CFP Events. Finance with R Workshop … Continue reading
Posted in Events, R language
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Variance targeting in garch estimation
What is variance targeting in garch estimation? And what is its effect? Previously Related posts are: A practical introduction to garch modeling Variability of garch estimates garch estimation on impossibly long series The last two of these show the variability of garch estimates on simulated series where we know the right answer. In response to … Continue reading
US market portrait 2012 weeks 38 and 39
US large cap market returns. Notice The week plot this time is for quite a long “week”. Last week there were problems downloading the data. There were still some this week, but the R code has been updated to be more useful in this event (it is no longer necessary to get all the data … Continue reading
garch estimation on impossibly long series
The variability of garch estimates when the series has 100,000 returns. Experiment The post “Variability of garch estimates” showed estimates of 1000 series that were each 2000 observations long. Here we do the same thing except that the series each have 100,000 observations. That would be four centuries of daily data. It’s not presently feasible … Continue reading
