"The illusion of control is the tendency for human beings to believe they can control or at least influence outcomes which they clearly cannot."
没有散户会自信到认为自己下的单会对市场有任何影响力。
楼主的问题应该是 The illusion of knowledge -- when more information reduces accuracy and increases confidence.  
散户对公司市场大宗商品信息进行搜集研究后,误以为预测的准确性会随信息量增加而增加,因而自信心大增,特别是在前几单盈利后。
http://www.sciencedirect.com/sci ... 3bf4e5fc387a0864eff