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Date updated:12-22-2006

Despite the post-war bull market which has been ongoing ever since the end of WWII, its interesting to see the dampening effect snow has on the stock markets. This is intended as a tongue-in-cheek trading system. Not intended for real trading but just an example of what can be tested. I did this also after hearing a rumor that Renaissance Technologies had a system for the stock market based on snowfall in central park.

The Blizzard System

BUY: If there are 5 inches of snowfall in Central Park in the prior 24 hours to the open, then buy the open.

SELL: At the close the same day

• Trades
• Equity Curve
• Comments

• 
• ^DJI
  Dow Jones Industr
• $10332.44
• -0.90%
• $10425.33

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Since 1945, 56 occurrences, and only 27 up trades. Average return overall: -0.1%

People owning ^DJI also tend to own: No records

• 
• ^IXIC
  Nasdaq Composite
• $2156.82
• 0.00%
• $0.00

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The Nasdaq. Since 1988, there have been 5 inches of snowfall or more on a trading day on 16 occasions. 9 of those occasions were up days but overall the return was -0.12% per trade.

People owning ^IXIC also tend to own: ^GSPC^NYA