"The panic was blamed on many factors--tight money, Roosevelt's Gridiron Club speech attacking the "malefactors of great wealth," and excessive speculation in copper, mining, and railroad stocks. The immediate weakness arose from the recklessness of the trust companies. In the early 1900s, national and most state-chartered banks couldn't take trust accounts (wills, estates, and so on) but directed customers to trusts. Traditionally, these had been synonymous with safe investment. By 1907, however, they had exploited enough legal loopholes to become highly speculative. To draw money for risky ventures, they paid exorbitant interest rates, and trust executives operated like stock market plungers. They loaned out so much against stocks and bonds that by October 1907 as much as half the bank loans in New York were backed by securities as collateral--an extremely shaky base for the system. The trusts also didn't keep the high cash reserves of commercial banks and were vulnerable to sudden runs."