The best definition of Myopic loss aversion is:

The tendency to choose stocks from news sources without proof of validity.

The tendency to avoid making a decision because you fear that, in hindsight, the decision would have been less than optimal.

This effect is the tendency to consider something that you own to be worth more than it would be if you did not own it.

The confusion between real buying power and nominal buying power.

The tendency to focus on avoiding short-term losses, even at the expense of long-term gains.