Value in investing is not visible. It cannot be observed directly, and it is never proven by the actions of other investors. As Warren Buffett famously said,
"Price is what you pay, value is what you get."
This distinction matters because value is always predicted or expected rather than guaranteed. Since value must be inferred from uncertain future outcomes, every investment is fundamentally a probabilistic activity. The accurate measure of any opportunity is its expected value, which represents a range of potential payoffs, each weighted by its probability.
Expected value is not a point estimate. It is a distribution. To evaluate an investment properly, you must consider two things at the same time: how likely you are to be right, and how much money you expect to make when right compared with how much you expect to lose when wrong.
Probability matters, but the size of the payoff matters just as much. Warren Buffett pointed out that you don’t have to be right a lot; you just have to be right about your big bets at the right time.
"Take the probability of loss times the amount of possible loss from the probability of gain times the amount of possible gain. That is what we are trying to do. It is imperfect but that is what it is all about."
This is also why understanding relative value in the context of investment probabilities is essential. An asset cannot be evaluated solely by its likelihood of success. It must be evaluated by the relationship between the probability of success, the size of the payoff and the cost of being wrong.
Buffett’s rule, “Rule No. 1: Never lose money. Rule No. 2: Never forget Rule No. 1,” is about capital preservation and avoiding significant, permanent losses, not eliminating all risk. It means avoiding situations where the downside is large, the upside is limited and the expected value is negative even when the probability of success looks high. Buffett focuses on a margin of safety and on finding great businesses with asymmetric upside. His best results came not from being right often, but from owning a few exceptional companies that created enormous long-term value.
Highly likely outcomes with low expected payoffs can be poor investments, especially after inflation is factored in. A high-probability, low-return investment may feel safe, but it can still destroy purchasing power. Conversely, an investment with a modest probability but significant upside can offer strong expected value. This is the power of asymmetry.
This framework is identical to the logic of pot odds in poker. A poker player does not need the best hand to make the correct decision. They only need the potential reward in the pot to outweigh the cost of calling. If the pot is ten times the size of the call, the player needs to win just over one time in eleven for the call to have positive expected value. The hand does not need to be a favourite. The payoff simply needs to justify the risk.
Some of the most successful investors deliberately look for high pot-odds situations: opportunities where the cost of the call is small relative to the potential payoff. Venture capitalists commit capital to companies where only one investment out of many may succeed, but its payoff can be 50 or 100 times the original stake. Distressed-debt investors buy securities that may look troubled, but where a small recovery in asset value can create disproportionate upside. Deep-value investors purchase companies trading far below intrinsic value, where limited downside meets meaningful upside. Options traders seek convex positions where a small premium controls large potential outcomes. All of these strategies mirror pot-odds thinking: the goal is not to win often, but to win big when the opportunity is right.
Rational investing comes from thinking in terms of distributions rather than absolutes, from focusing on asymmetry rather than certainty, and from allowing positive expected-value opportunities to compound over time.