a geomagnetic storm on earth due to solar activityThe NASA site spaceweather.com has a prediction of 25% chance of geomagnetic storms at mid-latitudes in the next zero to 48 hours. The chance at higher latitudes is 30%. Recall that geo-magnetic storms have been linked in an Atlanta Fed study to stock market weakness in the nest few days following the event especially if accompanied by Coronal Mass Emissions.

Dr. McDonnell is the author of Optimal Portfolio Modeling, Wiley, 2008

Jeff Watson writes:

Years ago, I looked at the correlations between solar activity and markets using the solar flux, A index, J index, and K index, and Sunspot number, and couldn't find anything offering predictive value. The only correlation I could make was the total solar output with grain prices, and my conclusions were suspect, to say the least as many other factors were in play. A great solar storm,on the level of Sept 1-2 of 1859(which blew out the telegraph system world wide) might be bullish on chip makers and other electrical component providers, plus would be very bullish on metals. However, a solar storm of that magnitude could possibly wipe out our digital communications, computer system, and internet, for a long time.

Yishen Kuik comments:

I'd never heard of the 1859 storm before. A little more recently, the Toronto Stock Exchange was halted by a solar storm in 1989.


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