further explanations for many economic phenomena
(Yang, 2019).
For example, the phenomenon of equity premium,
which could not be explained by traditional financial
theories, has been solved with the help of loss
aversion theory. Equity premium refers to the
additional return on equity investment over return on
risk-free assets, determined by comparing return on
equity investment with return on risk-free assets.
Risk-free assets often refer to investment instruments
with very low default risk, such as treasury bonds, and
their returns are relatively stable. However, due to the
high volatility of stocks, equity premiums can also
fluctuate, which has an impact on the financial
investment market. What’s more, because there are
many influencing factors of such fluctuations, the
influencing factors of equity premium fluctuations
are very worthy of research. Since 1926, the
annualized real return on equities has been about 7 %,
while the real return on Treasuries has been less than
1%, and the gap between the two is too great to be
explained by traditional investment risk aversion
theory. The explanation of loss aversion theory is
reasonable and understandable.
In fact, investors are short-sighted in the
investment process, compared with long term
investment, their attention is more focused on the
short-term.Moreover, because investors will be
affected by loss aversion, investors will have short-
sighted loss aversion when investing. In other words,
when investors invest, they will pay more attention to
short-term gains and losses than to long-term
benefits. Every time an investor evaluates an
investment product, it will be affected by its own
short-sighted loss aversion, so the more often an
investor evaluates an investment product, the more
his decision-making will be affected by short-sighted
loss aversion. Although stocks are risky and volatile,
they have higher returns in the short term. Therefore,
when the frequency of evaluations increases, that is,
the evaluation period decreases, the more attractive
stocks become to investors with a high degree of
short-sighted risk aversion, and more such investors
will choose to invest in stocks, so the equity premium
will rise. On the oppose, it will decrease. For
example, the study found that when the evaluation
period was 2 years, 5 years, 10 years and 20 years, the
equity premium decreased to 4. 65%, 3. 0%, 2. 0%
and 1. 4% respectively. The study strongly proves
that short-sighted loss aversion is an important factor
affecting equity premium (Benartzi & Thaler, 1995).
Through experiments found that although loss
aversion is widespread, there are many influencing
factors for loss aversion in different populations
under different circumstances. For example, the
degree of expected and actual loss aversion is
different, and the degree of loss aversion among
investors of different ages and genders is also
different.
In fact, the researchers found that there is a gap
between the expected loss aversion and the actual loss
aversion, and the degree of loss aversion in the actual
experience is greatly reduced. In the study, most of
the subjects’judgments about expected loss aversion
came from their subjective emotional judgments, and
their loss aversion coefficient was about 2. Therefore,
how is the loss aversion coefficient calculated? For
instance,a person who loses $100 gets very frustrated.
f he or she is as depressed as he is about picking up
$200 on the road, individuals has a loss aversion
factor of 2. Although subjects made predictions about
themselves, subjective emotional judgments did not
fully predict their judgments in real decisions, and
may even be overestimated. In practice, the loss
aversion coefficient of the subjects is about 1. 2, and
the comparison of the two data strongly points out
that the subjects have errors in their emotional
predictions. In other words, the researchers found that
people were more likely to be averse to loss when
they were only expecting it. In addition, because the
expected loss aversion level tends to be higher than it
actually is, investors who exhibit a high level of loss
aversion in anticipation tend to choose a low-risk
portfolio, although investors with a high level of
expected loss aversion feel similar to those with a low
level of expected loss aversion in the final investment
process.
Of course, the researchers also tested the
robustness of the experiment. In this experiment,
although the selected group of direct brokerage
clients of Barclays Brokerage, who were active in
trading and had a high portfolio value, did not fit the
general population profile, they were really fitted
with the investor profile. Given that the target group
of the study itself is the investment population, the
results of the experiment can be trusted; similarly,
although there was a previous hypothesis that the
experimental results might be influenced by risk
aversion, that is, the phenomenon that people choose
to avoid because they hate risk, the robustness test
also shows that the experimental results do not match
the risk aversion hypothesis, and the use of loss
aversion to explain it is a more reasonable choice to
exclude the interference of risk aversion in the
experimental conclusions (Merkle, 2020)
In addition to this, age and gender also affect the
level of loss aversion of different investors, which in
turn affects their final decision-making. In the
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