All shareholders may believe the true value is greater than the current price but still not buy or sell at the true value price because they don't know when the

All shareholders may believe the true value is greater than the current price but still not buy or sell at the true value price because they don't know when the company will sell for the true value. You see this when a company makes a bid for another company but the deal hasn't gone through yet. It sometimes trades for a little more or a little less, and that's when a deal has been accepted. When it's a little less, that's because there is some legal risk that the deal won't go through. When it is a little more that is because someone thinks the deal will get held up and renegotiated (like another bidder might show up). So it is possible and common for a stock to be lower then what people expect it to be worth. A really good example of this is when you have a powerful CEO or a person with more voting rights who might hold up a deal for their personal ambition. Think about Shari Redstone at Viacom. Most people think the company is worth more but difficult to sell because she wants to run it awhile to show she can. Twitter is worth a lot but difficult to sell for all the reasons this deal is showing. Supposedly Disney thought about buying it but realized it would be very controversial. When it takes a long time for the right buyer to show up investors trade the stock at a discount. It happens all the time in media stocks. (Full disclosure: I have Twitter stock)