In the long run credit prices return to their basic values
As the previous section has shown, some price effects of trading are temporary, and in an efficient market, in the long run, prices are expected to return to their fundamental values. However, the equilibrium price itself is not a fixed value, but moves with public news and information revealed by the trading process. In this section, we develop models that separate the equilibrium price dynamics from short-term price fluctuations around the equilibrium. Such models can be used, for example, to assess the speed of convergence to the equilibrium after a shock (e.g. a large transaction). The variance of the short-term deviations from the equilibrium price are a measure of market liquidity.
Finally, in a setting where one asset is traded on several different markets (fragmented trading), the models can be used to assess how informative the trading process is in each market (the contribution to price discovery); this last topic will be dealt with in section 9.4.
Tags: business competition, CEO, merger, pricing policy, shareholders, shares