<p>15.401 Finance Theory I is an MIT Sloan graduate course, published free on MIT OpenCourseWare from the Fall 2008 offering taught by Prof. Andrew Lo. It introduces the core theory of modern financial economics and financial management with a focus on capital markets and investments.</p><ul><li>Level: MIT Sloan graduate course</li><li>Cost: free; all materials are released under a Creative Commons licence</li><li>Topics: functions of capital markets and financial intermediaries, asset valuation, fixed-income securities, common stocks, capital budgeting, and diversification</li><li>Materials included: video lectures and slides, readings, recitations, problem sets with solutions, exams with solutions, and instructor insights</li><li>Eligibility: open to anyone; no registration, prerequisites, or application required</li><li>Credential: none — MIT OpenCourseWare does not grant certificates or course credit</li></ul><p>Learners access the materials directly on the OCW site and study at their own pace.</p>