Because investors attribute the advertised high past returns to managerial skill ratherthanluck, they mistakenly believe that the returns are likely to continue.
Some researchers suggest this is because men tend to be more overconfident than women and when they succeed at something, they attribute it to their superior skills (rather thanluck).
They certainly did not lack a fight and fervour to their play against United but it was a lack of composure in front of goal against the top-flight champions ratherthanluck which proved their downfall.