People might give that a low probability because it had never been over 10,000, so they just had no psychological anchoring on that number.

人们也许会认为几率不大,因为道指从未突破万点,所以人们心理对这个数字没有锚定效应

耶鲁公开课 - 金融市场课程节选

No definite article.

没有定冠词。

耶鲁公开课 - 旧约导论课程节选