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May 29, 2011

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Michał Tatarynowicz

Indeed, it is important to remember that correlation does not imply causation. I also think that this service is supposed to find events that cause searches, not the other way around.

Perhaps if you move the dates around a bit (i.e. push the dates of stock closing prices back a day or two) it could find some real correlations of news items about IBM causing searches about related issues, but I can't imagine a straight relation between _the volume_ of searches and the stock price. Any event, good or bad, will cause a rise in volume of searches. Perhaps you should try to correlate the volume of trading stock, not the closing prices.

Tony Hirst

I haven't checked by doing a proof of concept, but I think you can probably pull the Google Finance data directly into a Google spreadsheet using the =googlefinance() formula?
http://docs.google.com/support/bin/answer.py?answer=54198

JacopoPT

I'm agree w/ Michał Tatarynowicz's opinion.

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