Cicadas leave the depths below to mate on prime numbers every 13 or 17 years so as not to be eaten by predators with normal life cycles of 1 or 2 or 3 years. One wonders whether other living things in nature have such prime cycles. The market has prime cycles. It likes to do overnight what a person that has to sleep can not take advantage of. If it's down big one night, and you cant sell a position, then it knows you can't stay up the next day or two, so it will go up to let others but not you get out of the position the next day. The idea can be generalized one thinks. 

Scott Brooks writes: 

Another thing to consider is the confluence of cycles leading great highs or great lows.

The year was 1998 (give or take a year or two) in MO. We saw the normal group of Cicadas make their appearance as always in the summer. But that year, we saw something that we only see once or twice a century. We saw all the groups of Cicadas make their appearance at once.

I remember the normal soothing sound that I fell asleep to at night as a child become a constant irritating and often uncomfortable non-stop drone of Cicadas looking for love.

My backyard was often a fog of Cicadas flying through the air. The carcasses littered the ground and the trees. It became almost impossible to even walk a short distance outside with several Cicadas landing on you. Of course, they were harmless, but that didn't matter. It was a little freaky to know that you were surrounded by millions upon millions of Cicadas many of whom just wanted a place and decided to make you that place.

Although I didn't try it, I'm sure that if I were to have stood perfectly still out in the yard for any length of time, I would have had dozens, if not hundreds of Cicadas covering my body.

I had never seen anything like it in my life before. It was as though the world had become a horror movie with Cicadas starring as the monster that ate the Midwest.

I have lived through Cicadas' highs and lows. I believe I prefer the normal years, when their population is steady and stable and they lull you to sleep at night with melodic song.

Pitt T. Maner III adds:

You have to wonder what the collateral, human irritation effects will be this time with the billions emerging from Brood II. More crime? More accidents? People who are even more sleep deprived than normal? An increase in the sale of ear plugs? Might be interesting to look back for things possibly associated/correlated with the 17-year cicada cycle (1996, 1979, 1962, … etc.)

"US Braces for Billions of Cicadas" :

"The insects, though harmless, are considered a nuisance both for their size and sheer numbers, not to mention the noise pollution that has been measured at up to 94 decibels, loud enough to drown out the sound of overhead planes according to the Associated Press."

(but they do have a couple of positive effects):

"Additional effects linked to the cicada mating swarms include higher yield for fruit trees, beneficial tree pruning, as well as an increase in bird populations."

 Oh, and by the way:

From the Dept. of Stork/Baby statistics.

Who knew there is a "cicada market theory"? If only some of the critters could make it into the city!:

1) "The Wall Street Cicada Index"

"The large insects — which emerge every 17 years — turn out to be great news for the market. During years when the critters appeared — going back to 1928 — stocks posted an average annual gain of nearly 21%, roughly double their historical average. That's a far better track record than most active mutual fund managers enjoy, the majority of whom tend to lag the market average over time." and 'Standard & Poor's market-data guru Howard Silverblatt agrees. When MarketWatch called to sound him out this morning, it turned out he'd already thought to check out the cicada market theory and had been pleasantly surprised by the results. Of course, that doesn't mean he's rushing to buy. Just like when we gaze at the stars or tea leaves, it's easy to read too much into stock market returns, he warns. "You can prove anything you want," he says. "Start with your answer, and I have the data to prove it."'

2) But the "flash crash" of May 1962 would have occurred during a cicada emergence too.





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