Common Behavioural Finance Biases. Behavioural finance biases can impair our financial decision-making when they aren’t addressed. Here are two more examples of such biases: 1) Clustering illusion – The tendency to see patterns in random events. It’s important to keep in mind when watching stock price movements that what happened in the past few days doesn’t necessarily imply anything about the likely direction of the next move. 2) Recency – More weight is given to the latest information received, and less weight to older data. Our decision-making becomes biased by the order in which information is presented to us, which can lead to unwise financial decisions.