Availability bias, also known as availability bias (Availability Heuristic), is also called availability bias or availability bias, and is a type of heuristic bias. It means that people often judge the possibility of events based on cognitive ease. For example, in the decision-making process, investors pay too much attention to the information they know or can easily obtain, and ignore the in-depth exploration of other information, resulting in Bias in judgment.

Due to limitations of memory or knowledge, people now mostly use information that they are familiar with or can construct with imagination when making predictions and decisions, resulting in giving information that is easy to see and easy to remember. The proportion is too large, but this is only part of the information that should be used. There is a large amount of other information that must be considered. They also have an important impact on correct evaluation and perception, but people's intuitive inferences ignore these factors. Kahneman and Tversky (1974) called the above phenomenon availability bias. For reference.