450 search results for "quantmod"

Financial Turbulence Example

December 1, 2012
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Financial Turbulence Example

Today, I want to highlight the Financial Turbulence Index idea introduced by Mark Kritzman and Yuanzhen Li in the Skulls, Financial Turbulence, and Risk Management paper. Timely Portfolio did a great series of posts about Financial Turbulence: Part 1, Part 2, Part 3. As example, I will compute Financial Turbulence for the equal weight index

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Trading with Support Vector Machines (SVM)

November 30, 2012
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Trading with Support Vector Machines (SVM)

Finally all the stars have aligned and I can confidently devote some time for back-testing of new trading systems, and Support Vector Machines (SVM) are the new “toy” which is going to keep me busy for a while. SVMs are a well-known tool from the area of supervised Machine Learning, and they are used both

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Yahoo Tickers for DAX,MDAX,SDAX

November 25, 2012
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  In my various R - Tests I'm using usually the Yahoo Dataservice implemented in quantmod suppressWarnings(try(getSymbols(ticker, index.class="POSIXct", from=initDate, to=to,src="yahoo"),silent=TRUE))  If you would like to run ...

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Extending Commodity time series

November 21, 2012
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Extending Commodity time series

I want to follow up with Extending Gold time series post by showing how we can extend Commodity time series. Most Commodity ETFs began trading in 2006, please see the List of Commodity ETFs page. I will use DBC – PowerShares DB Commodity Fund, one on the most liquid Commodity ETFs as my proxy for

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Regime Detection Pitfalls

November 14, 2012
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Regime Detection Pitfalls

Today, I want to address some questions that I was getting regarding the Regime Detection post. In the Regime Detection post I showed an example based on the simulated data, and some of you tried to apply this example to actual stocks. There is one big problem that you have to be aware in designing

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Portfolio Trading

November 12, 2012
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Portfolio Trading

In finance and investing the term portfolio refers to the collection of assets one owns. Compared to just holding a single asset at a time a portfolio has a number of potential benefits. A universe of asset holdings within the … Continue reading →

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Back-testing Rules

November 10, 2012
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Back-testing Rules

Nowadays there are many trading strategies shared online with reproducible, decent, results. Have you asked yourself, if the strategies are so profitable, why the author bother even sharing them, when the path to riches is clear – just implement the strategy and use it? There are people, of course, who are fascinated and challenged by

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Regime Detection

October 31, 2012
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Regime Detection

Regime Detection comes handy when you are trying to decide which strategy to deploy. For example there are periods (regimes) when Trend Following strategies work better and there are periods when Mean Reversion strategies work better. Today I want to show you one way to detect market Regimes. To detect market Regimes, I will fit

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Pull Yahoo Finance Key-Statistics Instantaneously Using XML and XPath in R

October 29, 2012
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Pull Yahoo Finance Key-Statistics Instantaneously Using XML and XPath in R

This two-part blog post I published a day ago required key-stats from Yahoo Finance for all the companies in the control group I created for my research.  I wanted all the key-stats pulled, arranged in a data-frame and then present them side-...

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Replicating Krugman (Pt. 1)

October 27, 2012
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I'm a regular reader of Paul Krugman's NYT blog. A couple of months ago I decided to replicate some of the plots Paul published. At the time I was evaluating the quantmod package which seemed to made things easy. An easy startIn the first part I'll rep...

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