An Overview of the U.S. Regulated Fund Industry
The largest segment of the asset management business in the United States is registered investment companies (regulated funds). This article focuses on U.S. regulated investment companies—mutual funds, exchange-traded funds, closed-end funds, and unit investment trusts. These funds manage more than $17 trillion of assets, largely on behalf of U.S. investors. The industry has experienced strong growth over the past quarter century from asset appreciation and strong demand from households due to rising household wealth, the aging of the U.S. population, and the evolution of employer-based retirement systems. Price competition and supply-side product innovations and efficiencies have reduced the average price that investors pay for fund services.
The Global Growth of Mutual Funds
With few exceptions, mainly in Asia, mutual funds grew explosively in most countries around the world during the 1990s. Equity funds predominated in Anglo-American countries while bond funds predominated in most of Continental Europe, and in middle-income countries. Capital market development (reflecting investor confidence in market integrity, liquidity, and efficiency) and financial system orientation were the main determinants of mutual fund growth. Restrictions on competing products acted as a catalyst for the development of money market and (short-term) bond funds.
The Invariance of the Vacuum is the Invariance of the World
The following theorem is demonstrated: If the vacuum is invariant under the group generated by the space integral of the time component of a local vector current, then the Hamiltonian is invariant also. A similar theorem holds for the group generated by the space integral of a space component of a local axial-vector current.