FIN 260 Lecture Notes - Lecture 66: Mental Accounting, Gambling, Current Asset

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• Asymmetric Loss Aversion in Finance:
➢ Mental Accounting Bias:
o People may allocate money to a Cash account, whereas at the same time
they allocate money to Credit card purchases account.
o Cash account is a current asset
o Credit card account is future income.
â–Ş The reason people bid so much more w/ a credit card bid.
▪ We don’t value future income as much as we do current assets.
o In finance this has big implications:
â–Ş People treat capital different from interest.
âť– They are willing to spend the interest, but not willing to spend the
capital (which may have also gone up).
âť– EX: A stock that has gone up in value is much harder for people to
sell & spend than interest from a bond.
â–Ş House Money effect.
âť– When people make a lot of money in the stock market, they take
more risk since they feel they are betting house money (gains that
they already won).
âť– Most people engage in mental accounting.
âť– We value dollars differently from different sources even though
money is interchangeable.
➢ Q: How can we avoid or minimize mental accounting bias?
1. Focus on Total Returns.
o Don’t separate things into principal & interest.
2. A Global view on your portfolio that examines correlations between all
the accounts.
3. Watch out for House Money effect.
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Document Summary

They are willing to spend the interest, but not willing to spend the capital (which may have also gone up). Ex: a stock that has gone up in value is much harder for people to sell & spend than interest from a bond: house money effect. When people make a lot of money in the stock market, they take more risk since they feel they are betting house money (gains that they already won). We value dollars differently from different sources even though money is interchangeable. We know that planning for retirement is important. Q: when we cannot use self-control, when we are our consistently irrational, what can we do: first realize it, second, create policies that nudge us to make better decisions. But many people, in spite of benefits, do not sign up: in one plan (madrian & shea (2001) had an opt-in provision.

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