Currently, institutional investors are prohibited from owning a majority of the shares of a U.S. corporation, or to exert any influence in the way the company is run. Furthermore, any investment entity that owns at least 20 percent of a corporation's stock may not sell those shares without a full day's notice. A sale of that magnitude would cause a panic among the other investors in that company and start a massive sell-off that would cause the stock price to drop precipitously. Having prior knowledge of that sale would give larger investors a considerable advantage over smaller ones who mostly likely would not be aware of the intent to sell. According to the passage, the purpose of the one-day notice requirement to sell shares is to