Look at the stock market right now, does that seem efficient? Sometimes volatility is necessary. "Imagine if a publicly traded company announced that in 1 year

Look at the stock market right now, does that seem efficient? Sometimes volatility is necessary. "Imagine if a publicly traded company announced that in 1 years time, they would buy back half of their outstanding shares (not a great analogy but its the best I can think of). What would happen to the stock price?" The irony is that a bunch of companies are and did do EXACTLY this with trillions of dollars designed to bail out the economy.