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Do you believe in efficient-market hypothesis (EMH)?

During discussion about things where you had strong opinions and then changed your mind, someone mentioned EMH. Do you believe in EMH and if so is it strong or weak version?

I used to believe EMH but not strongly. The pandemic changed my view because I managed to invest some money when the stock market dived and was clearly influenced by overly pessimistic view of the impact of covid. Some might argue that the market reacted to the irrational government measures, so it is not that the case that the market was mistaken. I still think that investors were equally irrationally pessimistic. I reject the view that this is a hindsight and I was merely lucky. I am not big expert and I did not possess any proprietary information. I had the same information as everybody else, I just didn't let my emotions take over me. This is further confirmed that even today when all the events have passed exactly as predicted, majority of people still maintain their mistaken views that covid was very dangerous to young and non-risk population.

It is the only time when I saw the rest of the society to be so wrong in their views and clearly this was my once-a-lifetime chance. I haven't see any other opportunities for easy money so far but I think that people who are experts in their fields and investors might have been able to find more opportunities.

One of them was found by Michael Burry who definitely saw that the 2008 financial crisis was coming. He wasn't just lucky because he had read and analysed all the documents and had to create special investment instruments to profit for it. In this way, it wasn't easily accessible by laypersons like me who have no time or understanding about investment. Again, most professionals were blinded by collective frenzy.

What is your opinion about EMH?

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When I learned that US embassy workers were having unexplained brain damage, many people ascribed that to “sonic weapons” from unknown attackers. The most likely explanation however was that it is probably coincidence and more likely it was mass psychogenic illness. This Havana syndrome is still unresolved but if there was a way to bet on this, the correct way would be to bet against sonic weapons.

Now, if the governments in many countries would wrongly become convinced that it was sonic weapon, it would seem that you lose the bet. But eventually the truth comes out and the bet against sonic weapons has much higher chance to be right.

Covid was something similar to this. When due to human nature collectively we have markets going into wrong direction, you may or may not be able to profit from it but in any case you need to take stance and try to correct the delusion that is harming all of us. If you can it directly by placing winning bets, that's preferrable because it might help other people to realize sooner that their thinking is faulty. Granted such cases are rare, or non-existent for most people.

I assumed that the "unexplained brain damage" was caused, not by "weapons", but by surveillance devices. Enemy countries tend not to be concerned about health when they need to do some spying and the process has them sending out radio waves at windows, or reflectors, or hidden bugs.

And the government probably isn't going to publicize it if they discover it, either.

I don't think that the government knows what caused the brain damage. Was it even “caused” apart from natural progression of certain disorders?

Here is very important thing – people hate uncertainty. That's why they are more likely to believe far-fetched theory about sonic weapons than reject this theory and be left with no explanation.

Well, I had read Krugman's “End This Depression Now” explaining why stimulus in certain conditions is needed. I read the book because I was going through personally depressive period in my life but the book had some insights anyway. Krugman was proven right with sufficient evidence that I was surprised that so many experts still disagreed with him and demanded austerity policies instead. Nevertheless, even the staunchest critics have to admit that stimulus worked better during economic contraction, so it was no-brainer that the governments faced with economic contraction during covid pandemic would try to use stimulus too. I didn't believe that it will be very effective because unlike normal conditions people were prevented from spending money. The government had little choice though because they had to make sure that people who were forced out of work by their policies can still pay rent, buy food etc.

Incidentally, the lack of spending opportunities also gave me chance to invest some money. I expected that other people would do the same and it seems that eventually they did. But when I saw stock market taking a dive, it made no sense. I didn't expect to make a quick profit, I thought that recovery would take longer time. I believed that eventually everybody would get covid and then all the restrictions will be shown useless. Even the most totalitarian governments would have to admit that their policies are futile. Once restrictions are gone, people would quickly restart economic activities and stock market would rise.

Scott wrote that the stock market dive actually happened due to automatic selling. Many funds set automatic scripts to sell when the price reaches certain low threshold to prevent from further losses. Selling moved the price even lower with more and more funds initiating automatic selling.

You are missing the main reason why the stimulus was too much this time. It was simply because the government acted in contradictory ways and prevented people spending money. The fact that different restrictions continued after most elderly had received vaccine was the biggest unforced error.

I am not sure I believe that. The reason of the crash and everything that followed was solely due to the government's mistaken actions. I don't know specifically about the US, but the life in 2021 was far from normal and it was also solely due to the government's mistaken actions. It would be strange if it had no deleterious effect on the economy.

The government was trying to whitewash the negative effects on people.

This data does not show this. Even if the expenditure increased but it could be the case that it went to wrong sectors of the economy.

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