Historical 30-days correlation Against S & P 500 Index
Correlation is a statistical measure of how closely a change in one series of data matches the change in another. A correlation?s sensitivity can vary according to the period of time used. As with any time series, the shorter the time period the more responsive a statistic is to market conditions while the longer the time period the more stable the result. A 30-day historical period tries to create a balance between these response rates.