Some years ago, Japan's four largest brokerage firms (Yamaichi Securities Co., Nomura Securities Co,, Daiwa Securities Co, and Nikko Securities Co.) formally asked their government to lift bans that restrict their freedom to invest in stocks. One of those bans prevents a brokerage firm from trading for its own account (that is, buying and selling for itself rather than for clients) during certain times of the trading day. The other ban restricts a brokerage firm participating in more than \(30 \%\) of the trading of any one stock within a month. Consider these restrictions in terms of the role of dealers in financial markets and the requirements for operational and price efficiency in a market. Do you think that lifting the restrictions would help the Tokyo Stock Exchange to be more efficient with regard to price and operations?