Even when people are only buying with no intent to sell, they'll often complain if prices fall right after they've bought an item, and ask for a rebate for the difference, because they feel they deserve the new lower price. Many retailers are aware of this psychology and do offer some sort of forward-looking price match, both to help buyers overcome that hesitation, and to avoid going through the paperwork of returning and refunding a used item just to sell the same thing again anyway. But the stock market offers no such buyer protections.
