It has been more than 50 years since the idea of stock prices containing all relevant information was put forth. Information might come in the form of data from a company’s financial statements, news about a new product, a change in the regulatory environment, or simply a shift of investors’ tastes and preferences toward owning different investments.

Information is incorporated into security prices through the buying and selling process. While fair prices may not depend on a certain level of trading, over $400 billion of stocks traded on average each day in the world equity markets suggests that a great deal of information is incorporated into stock prices. [1]

As investors, we should consider whether we want to use the price we observe or look for a better price. A recent study from Dimensional Fund Advisors shows that over the 15-year period ending December 2017, only 14% of investment managers that attempted to outguess the market survived and beat benchmarks.*

This study is just one of many conducted over the past 50 years that have documented similar results. With investing, many things are out of our control, but we can make decisions that improve our odds of having a positive investment experience. Looking at these results, attempting to identify a better price than the one we observe in the market may not be accomplishing this objective.