Zusammenfassung
There has been little success in accounting for the
absolute level of asset prices. The standard approach
is that fluctuations in asset prices are attributable
to changes in fundamental values. Recent studies have
challenged the idea that stock price movements are
wholly attributable to the arrival of news. Several
tests were undertaken to determine the fraction of the
variation in aggregate stock returns that can be
attributed to news. First, stock returns were examined
in relation to the arrival of information about
macroeconomic performance. In this instance, it is
shown that news proxies can explain about 1/3 of the
variance in stock returns. Then, stock returns were
examined in relation to other types of information.
News about wars, the presidency, or significant changes
in financial policies affect stock prices, but the
results suggest that qualitative news does not account
for all the return variation that cannot be traced to
macroeconomic causes.
Nutzer