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Howard Stanley Marks is an American investor and writer. He holds a B.S.Ec. degree cum laude from the Wharton School of the University of Pennsylvania with a major in finance and an M.B.A. in accounting and marketing from the Booth School of Business of the University of Chicago, where he received the George Hay Brown Prize. He is a CFA® charterholder and a Chartered Investment Counselor.

In 1995, he co-founded Oaktree Capital Management. From 1985 until 1995, he led the groups at The TCW Group, Inc. that were responsible for investments in distressed debt, high yield bonds, and convertible securities. He was also Chief Investment Officer for Domestic Fixed Income at TCW. Previously, he was with Citicorp Investment Management for 16 years, where from 1978 to 1985 he was Vice President and senior portfolio manager in charge of convertible and high yield securities. Between 1969 and 1978, he was an equity research analyst and, subsequently, Citicorp's Director of Research.

"This is that rarity, a useful book."--Warren Buffett Howard Marks, the chairman and cofounder of Oaktree Capital Management, is renowned for his insightful assessments of market opportunity and risk. After four decades spent ascending to the top of the investment management profession, he is today sought out by the world's leading value investors, and his client memos brim with insightful commentary and a time-tested, fundamental philosophy. Now for the first time, all readers can benefit from Marks's wisdom, concentrated into a single volume that speaks to both the amateur and seasoned investor. Informed by a lifetime of experience and study, The Most Important Thing explains the keys to successful investment and the pitfalls that can destroy capital or ruin a career. Utilizing passages from his memos to illustrate his ideas, Marks teaches by example, detailing the development of an investment philosophy that fully acknowledges the complexities of investing and the perils of the financial world. Brilliantly applying insight to today's volatile markets, Marks offers a volume that is part memoir, part creed, with a number of broad takeaways. Marks expounds on such concepts as "second-level thinking," the price/value relationship, patient opportunism, and defensive investing. Frankly and honestly assessing his own decisions--and occasional missteps--he provides valuable lessons for critical thinking, risk assessment, and investment strategy. Encouraging investors to be "contrarian," Marks wisely judges market cycles and achieves returns through aggressive yet measured action. Which element is the most essential? Successful investing requires thoughtful attention to many separate aspects, and each of Marks's subjects proves to be the most important thing.