New York, Specimen Odd Shares, Fixed/Adjustable Rate Cumulative Preferred Stock, Series A, Black on Blue underprint, Alexander Hamilton At right, Pin-punch Specimen. Donaldson, Lufkin & Jenrette (DLJ) was a U.S. investment bank founded by William H. Donaldson, Richard Jenrette and Dan Lufkin in 1959. Its businesses included securities underwriting; sales and trading; investment and merchant banking; financial advisory services; investment research; venture capital; correspondent brokerage services; online, interactive brokerage services; and asset management. The firm was acquired in August 2000, by Credit Suisse for $11.5 billion. As research became more of a commodity throughout the 1980s and 1990s, they expanded into other businesses and grew dominant in high yield fixed income, or so-called, "junk bond" securities. A major factor in DLJ's underwriting and trading success with these securities were the employees they had recruited from Drexel Burnham Lambert, during Drexel's decline in the late 1980s and its bankruptcy in 1990. Rare Specimen Stock Certificate