>>nobody would want to buy or sell, as doing so would be money-losing. Somewhat related, there is a saying that caused me great hesitation for many years: "Rem

>>nobody would want to buy or sell, as doing so would be money-losing. Somewhat related, there is a saying that caused me great hesitation for many years: "Remember, whatever trade you make, someone else is making the exact opposite bet; what is the likelihood which of you is wrong?". Now, in large, this hesitation is largely good, but not to excess. I then realized that on the exact same trade people can have very different legitimate perspectives that do NOT invalidate yours, i.e., many situations where you can both be right, for your goals. E.g., a trader may have a great reason to sell a stock this minute while a long-term investor has an equally great reason to buy and accumulate the stock. Or, stocks can go in/out of specific investing criteria such as for growth, value, momentum, etc., and different portfolio managers will be selling and buying the same stock at the same minute and both be completely correct about the stock meeting their goals.