The numerous small investors cannot, in the strict sense, be controlled; but their dependence upon the banker insures their being duly influenced. A large part, however, of all bonds issued and of many stocks are bought by the prominent corporate investors; and most prominent among these are the life insurance companies, the trust companies, and the banks. The purchase of a security by these institutions not only relieves the banker of the merchandise, but recommends it strongly to the small investor, who believes that these institutions are wisely managed. These controlled corporate investors are not only large customers, but may be particularly accommodating ones. Individual investors are moody. They buy only when they want to do so. They are sometimes inconveniently reluctant. Corporate investors, if controlled, may be made to buy when the bankers need a market. It was natural that the investment bankers proceeded to get control of the great life insurance companies, as well as of the trust companies and the banks. The field thus occupied is uncommonly rich. The life insurance companies are our leading institutions for savings. Their huge surplus and reserves, augmented daily, are always clamoring for investment. No panic or money shortage stops the inflow of new money from the perennial stream of premiums on existing policies and interest on existing investments. The three great companies--the New York Life, the Mutual of New York, and the Equitable--would have over $55,000,000 of _new_ money to invest annually, even if they did not issue a single new policy. In 1904--just before the Armstrong investigation--these three companies had together $1,247,331,738.18 of assets. They had issued in that year $1,025,671,126 of new policies. The New York legislature placed in 1906 certain restrictions upon their growth; so that their new business since has averaged $547,384,212, or only fifty-three per cent. of what it was in 1904. But the aggregate assets of these companies increased in the last eight years to $1,817,052,260.36. At the time of the Armstrong investigation the average age of these three companies was fifty-six years. _The growth of assets in the last eight years was about half as large as the total growth in the preceding fifty-six years._ These three companies must invest annually about $70,000,000 of new money; and besides, many old investments expire or are changed and the proceeds must be reinvested. A large part of all life insurance surplus and reserves are invested in bonds. The aggregate bond investments of these three companies on January 1, 1913, was $1,019,153,268.93.