The regret theory, based on behavioural economics and psychology, illuminates this complex phenomenon. We are about to define, analyse, and apply regret theory to give investors and business owners.
Financial and entrepreneurial success and failure are inevitable. Investors and business owners have many opportunities with different profit and risk potentials. Financial analysis is complex, so understanding decision-making psychology is crucial. The regret theory, based on behavioural economics and psychology, illuminates this complex phenomenon. We are about to define, analyse, and apply regret theory to give investors and business owners a sophisticated decision-making tool.

Understanding the Theory of Regret
In the early 1980s, Graham Loomes and Robert Sugden came up with a theory about making decisions when you don’t have all the information you need. It means that people think about how their choices will make them feel, especially if they make a bad choice they will regret. When someone realises that another choice would have been better, they start to feel regret.
This theory shows that people are strongly affected by how they feel about things.
How to Understand Regret
To understand how regret theory works, you need to look into the psychology of regret. Regret is a complicated and powerful emotion that can have a big effect on the choices we make. There are several important psychological factors at play:
Regret for the Future
Before making a choice, people often think about the possible consequences and how likely they are to regret it. This fear of regret affects how they make decisions, so they choose options with the least chance of making them sad. For example, a business owner who is deciding between two investment opportunities may choose the one with the lower risk so that he or she won’t feel bad if the high-risk investment doesn’t work out.
Anticipated Regret Aversion
The tendency to do things that will leave you with the least to regret. People may be less likely to take risks that could pay off in the long run if they are afraid of failing. Because of this fear, some people might miss out on good chances to invest.
As a result, regret
People can have outcome regret if the choice they made leads to bad things happening. This regret can have a big impact on future decisions, making people less likely to take the same risks or make the same choices.
How the Theory of Regret Can Be Used
Investors and business owners can use the regret theory in many ways. When people know more about regret, they can make better decisions. Here are some ways that the regret theory can be used in business and investing:
Different kinds of holdings
The regret theory can help investors decide how to diversify their portfolios. Investors can find a balance that fits their risk tolerance and long-term goals by thinking about the regrets they might have with a concentrated portfolio versus a diversified portfolio.
- Analysis of the chance
Using regret theory, business owners can weigh the risks and rewards of new business opportunities. By comparing the regret they might feel about not taking an opportunity to the regret they might feel about failing, they can make better decisions about which opportunities to take.
- How to Get Out
Entrepreneurs can use the regret theory to help them decide when and how to sell their businesses. It can help them figure out the best time to sell based on how they feel about selling too early or too late.
- Dealing with Risks
Using regret theory, investors and business owners can come up with ways to handle risks. By figuring out how likely regret is and how to deal with it, they can find a balance between risk and reward that fits with their goals.
Examples from real life
Let’s look at some real-world situations to show how regret theory can be used.
Example of an Investment Portfolio
Imagine that an investor is thinking about putting a big chunk of their money into a high-risk, high-reward tech startup. They hope to make a lot of money, but they are also aware that they could lose everything. Using the theory of regret, they weigh the regret of not investing if the startup becomes a unicorn against the regret of losing their whole investment. This analysis helps them decide how much of their portfolio should be put into the startup.
Example 2: Making a Business Decision
A young entrepreneur has made a product that could do well on the market. They are talking about whether or not to invest more money to increase production. Using the theory of regret, they weigh the regret of missing out on a profitable market opportunity if they don’t scale up against the regret of spending more money and not getting the market penetration they want. This analysis helps them decide if they should scale up production or not.
Unlike some economic models, which are based on specific math equations, regret theory is more based on behavioural economics and psychology than on specific math equations. It is a way of making decisions that focuses on the emotional and psychological parts, especially the feeling of regret and anticipation.
Expected Regret (ER) can be said in the following way:
ER = Σ [p(outcome) * Regret(outcome)]
In this equation, “p(outcome)” stands for the chance that a certain outcome will happen.
“Regret(outcome)” stands for the regret about that result.
The idea is to figure out how likely you are to regret each choice and then pick the one with the least likely regret. But it’s hard to measure and put a value on regret because it is subjective and can mean very different things to different people.