As you will learn later in this book, volatility is the most nebulous factor in determining what the value, and therefore the price, of an option actually should be—and no one is more adept at assessing volatility than Sheldon Natenberg. As Director of Education for Chicago Trading Company and a highly sought-after lecturer at professional training seminars both here and abroad, Sheldon has helped many of the world’s top institutional investors, mutual fund managers, and brokerage analysts better understand volatility and utilize it in valuing and pricing options of all types.

正如你在本书后面会学到的，波动性是决定期权价值和价格的最模糊的因素，没有人比谢尔登·纳滕伯格更善于评估波动性。作为芝加哥贸易公司（Chicago Trading Company）的教育总监和国内外专业培训研讨会上备受追捧的讲师，谢尔登帮助许多世界顶级机构投资者、共同基金经理和券商分析师更好地了解波动性，并利用波动性对各类期权进行估值和定价