Neo Phonelobster Prime wrote: ↑Sun Nov 03, 2024 11:04 pm
deaddmwalking wrote: ↑Sun Nov 03, 2024 9:48 pm
You keep using examples with a negative expected return as counterexamples for those with a positive expected return.
NO. You fucking idiot I'm telling you that you do NOT routinely get examples with a positive expected return. Not without infinite investments/investment money.
I agree that with GAMBLING, situations with a positive expected return are rare. In fact, I have been very clear that situations like that are usually the result of someone making a mistake - but not always. But that's why calculating the odds and the payout is a useful function. Did you know that the worst bet in Roulette is 'the first five'? Every bet in Roulette favors the house, but this particular bet favors the house by about 1 1/2x as much as any other bet. Knowing how to calculate expected value is how you can evaluate between different bets. If you find one that has a positive expected value (which is admittedly rare) you can make money exploiting that even without infinite money to invest.
Neo Phonelobster Prime wrote: ↑Sun Nov 03, 2024 11:04 pm
You can manufacture an example where you do out your ass like Foxwarriors $199. The thing is, those are rare enough in reality they might as well not exist, and YOU are being criticized for your stance on long shot investments in tech companies like early days Paypal and Microsoft or the 30 million US Presidential elections that somehow theoretically happen.
An S&P Index Fund has returned 10.7% as an average compounded rate of return over the last 30 years. That means that if you invested $1,000 in an S&P Index fund 30 years ago, you'd now have $7,200. Finding positive returns isn't even hard. People will tell you that a well-diversified stock portfolio will typically out perform inflation, and that's true. But if you're trying to MAXIMIZE returns, you want to be able to calculate 'winners' versus 'losers'. That's possible too!
In traditional stock investments (as opposed to shorting a stock) you invest a certain amount of money. If that stock fails, the most you can possibly lose is the amount you invested. If you owned stock in SVB, that money is gone. There are plenty of other historical examples of high-flying publicly traded companies that went bankrupt and their stock prices collapsed. On the other hand, there's no limit to how much a stock can accumulate value. In the same time that a well-diversified stock portfolio would have turned your $1,000 into $7,200, investing $1,000 into Apple would have turned it into $290,000. Now, billionaires have a lot of money, but not INFINITE money. Still, they get invited to consider investing 'early' before public launches of companies. For every Google or Apple there's a Theranos.
If you know there are bad investments and good investments
and you can roughly determine what percentage are which, even if you can't identify the good ones from the bad ones you can determine
mathematically whether you're likely to win money or lose money if you bet on all of them. In American Roulette, betting on every number costs you $38 and you win $35 plus your $1 bet for a total return of $36 (losing $2). With investments, you can divide your 'wager' across any or all of them. Even if a small number of companies make a BIG return, you're very likely to earn more than you lose. Lance Armstrong's $100k investment in Uber earned him $20,000,000. That's enough to cover a lot of 'bad bets'.
Neo Phonelobster Prime wrote: ↑Sun Nov 03, 2024 11:04 pm
The problem is YOU are stupid enough to think that if there is AN example where it COULD work then it MUST work for the examples where you WANT it to work, your lack of a deeper than superficial understanding of the math and your inability as a liberal to compare two values facilitate your total failure to see the threshold where your contrived examples cease being relevant.
The math works the same whether the example works or doesn't work. That's why you run the expected value calculations.
IF EXPECTED VALUE IS POSITIVE then you're likely to make money. If the expected value is negative, you're likely to lose money. But nothing is guaranteed. Sometimes people spend $2 on a lottery ticket and end up winning $500 million. The odds of getting all those numbers right - 1 in 292.2 million. Incidentally, the Expected Value of your $2 ticket with a $500,000,000 'take' is $1.71 (though that has to be after taxes and such). Looking at the 25 biggest jackpots, there were 37 winning tickets, so you odds of 'splitting' the jackpot are actually surprisingly high (higher jackpots encourage more players). If you assume that you're EXPECTED to earn 2/3 of the jackpot if you win because SOMETIMES you share, that reduces it further. Those are good things to consider. And then, finally, how many times you'd have to play before you're likely to win. But, knowing that there are 1.22 million possible combinations of numbers, for $584,402,676
you could play them all, guaranteeing you win. That's close enough to 'infinite money' that it isn't ever REALLY worth it, but that has more to do with how we value money and nothing to do with mathematically sensible investments.