肯·费雪：投资需要常识，但不能盲目相信常识

Core Viewpoint - The article emphasizes the importance of questioning widely accepted investment "common sense" to avoid costly mistakes and improve investment outcomes, as highlighted by renowned investors like Charlie Munger and Ken Fisher [1][2][8]. Group 1: Investment Philosophy - Ken Fisher, son of Philip Fisher, advocates for the investment principle of "buying great companies at reasonable prices," which is highly regarded by investors like Warren Buffett and Charlie Munger [2]. - Fisher's book, "Anti-Common Sense Investing," serves as a manual to debunk prevalent investment misconceptions that lead to significant financial losses for investors [3][8]. Group 2: Common Investment Mistakes - The article discusses common errors made by retail and professional investors, emphasizing that many believe they are making wise decisions without questioning their validity [5][6]. - It highlights the tendency of investors to avoid questioning established beliefs, which can lead to adherence to false truths and costly errors [6][7]. Group 3: Challenging Conventional Wisdom - Fisher encourages investors to consistently question what they think they know, particularly regarding widely accepted economic indicators like unemployment rates, which may not predict future market trends as commonly believed [7][8]. - The book addresses various misconceptions, such as the belief that high unemployment negatively impacts the economy, and provides data to challenge these views [8][9]. Group 4: Strategies for Better Investment Decisions - The article outlines strategies for investors to critically assess common beliefs, including asking if something is true, conducting historical research, and analyzing correlations [10][11][12]. - It emphasizes the importance of contextualizing data to reduce fear and improve decision-making [12][13].