@roboquant: Anchoring bias is one of the most expensive cognitive errors in trading. A 2013 study of 66,000 brokerage accounts found traders were 50% less likely to sell a losing position than a winning one at the same move size — because the entry price acts as an irrational mental anchor. Understanding this bias is the first step to fixing it. #anchoringbias #tradingpsychology #behavioralfinance #trading