> If the economy can change that much over the weekend, then the traders, stockbrokers, Wall Street, whoever, is doing a pretty poor job at pricing companies.

> If the economy can change that much over the weekend, then the traders, stockbrokers, Wall Street, whoever, is doing a pretty poor job at pricing companies. One country invading another country can happen over a weekend. A bunch of terrorists / freedom fighters may do some action over a weekend. A bunch of investors (independent of each other) may decide to do a bunch of profit-taking and rebalancing over a weekend. New information and perceptions of old information can occur over a weekend (or a day, or an hour). > The financial markets are absolute bullshit. Market prices are thought to reflect the currently available information of companies and commodities, but—to paraphrase William Gibson—information is not evenly distributed. Hedge funds have been known to use satellites to get an information edge: * https://newsroom.haas.berkeley.edu/how-hedge-funds-use-satellite-images-to-beat-wall-street-and-main-street/ https://newsroom.haas.berkeley.edu/how-hedge-funds-use-satel... As new information becomes known, or 'old' information becomes more widely known, investors re-assess what they think things are worth. If it becomes (more) known that inflation has gone up/down, or unemployment has gone up/down, that has implications on what the economy is doing and will do in the future, what people ("consumers") will do, and how they will spend (if unemployment is rising, people may save more and spend less, lower revenues/profits, etc). Reality changes due to people's decisions, that impacts companies (and commodities), and that impacts how much a company may be 'worth' going forward.