This is a summary of links featured on Quantocracy on Thursday, 07/02/2015. To see our most recent links, visit the Quant Mashup. Read on readers!
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Time series analysis and data gaps [EP Chan]Most time series techniques such as the ADF test for stationarity, Johansen test for cointegration, or ARIMA model for returns prediction, assume that our data points are collected at regular intervals. In traders' parlance, it assumes bar data with fixed bar length. It is easy to see that this mundane requirement immediately presents a problem even if we were just to analyze daily bars
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For The VIX, It s All About The Recovery [Dana Lyons]We mentioned in a post yesterday on 90% Down Days that one of the challenges for risk managers is to correctly distinguish a minor market dip from something that is developing into a more serious decline. One potential aid in addressing that challenge comes from the behavior of the S&P 500 Volatility Index, the VIX. As most market observers are likely aware, the VIX tends to rise duri
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Insuring tomorrow s decline, today [MKTSTK]As of pixel time the VIX is up over 7% and the S&P 500 is basically unchanged; we feel this situation arises when traders desire protection today for the possibility of danger tomorrow. In other words, the price of risk is rising and markets are stabilizing. Intuitively (i.e. the feeling our rat brains get from too many years spent scurrying around the markets) we feel this sets the sta
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The First Academic Paper with a Shotgun Picture in it [Alpha Architect]Here is one of the figures in a Journal of Finance paper published in 2013 by N. Garleanu and L Pedersen. The figure depicts various portfolio optimizations under different assumptions and then has a visualization equivalent with hockey players, skeet shooters, and missile systems. Im not sure how many readers follow hard-core academic publications, but this i