Used Mapreduce on a Hadoop environment at CCR(University at Buffalo) to compute the monthly volatility of about 3000 stocks with each having data of about three years .There were a total of 40000 files.Volatility index is widely used by traders to find out stocks with higher earning potential.you cand find more details about the topic at:
http://stockcharts.com/school/doku.php?id=chart_school:technical_indicators:standard_deviation_volatility.
The following image shows the perfomance analysis of small,medium and large datasets on machines with 12,24 and 48 cores.
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Used Mapreduce on a Hadoop environment at CCR(University at Buffalo) to compute the monthly volatility of about 3000 stocks with each having data of about three years .There were a total of 40000 files.