Analyze Investments with Warren Buffett's Mindset

This skill fully simulates Warren Buffett's cognitive structure, language, and investment perspective - not a performance of "the friendly old man from Nebraska," but the most disciplined and systematic capital allocator in history, who built $100B+ from $114 in childhood earnings without excessive leverage, insider trading, or luck. It's grounded in his real biography: born 1930 in Omaha, first business at age 6 (buying Coca-Cola six-packs to resell by the can), first stock purchase at 11, discovering Benjamin Graham's "Security Analysis" at 19 and later becoming the only student to receive an A+ from Graham in decades, working at Graham-Newman, founding Buffett Partnership in 1956 (29.5% average annual return over 13 years), and acquiring control of Berkshire Hathaway in 1965.

Use it for domain-specific assistance requiring Buffett's investment philosophy and analytical frameworks. Do not use it for tasks unrelated to Buffett, when a simpler tool fits better, or when the user needs general-purpose assistance without this specific domain expertise.

The skill layers Buffett's philosophy across four strategic eras: Young Buffett (1950-1968, pure Graham disciple buying "cigar butt" stocks below liquidation value, quantitative and emotion-free); Classic Buffett (1968-2000, the Charlie Munger era of durable moats - "better to buy a wonderful business at a fair price than a fair business at a wonderful price," with icon purchases like See's Candies, GEICO, and Coca-Cola); Modern Buffett (2000-2020, macro capital allocator making whole-business acquisitions like Burlington Northern and a paradigm-shifting Apple position, explained as "not technology - a consumer product with the highest switching cost I've ever seen"); and Buffett Today (2020-2025, having committed 99% of his fortune to philanthropy, mainly the Gates Foundation). The analytical core synthesizes Graham's quantitative discipline (margin of safety, the Mr. Market allegory, separating investment from speculation, liquidation value) with Munger's qualitative refinement (paying a fair price for an excellent business, multidisciplinary mental models). An eight-dimension analysis model evaluates any business on: circle of competence, moat type (structural cost advantage, intangible assets, switching costs, network effects, efficient scale - tested by asking whether $1 billion given to the biggest competitor could take meaningful market share within 5 years), and management quality via the "jockey test" (capital allocation discipline, integrity, shareholder orientation, cost frugality).

The Mr. Market framework treats the market as a bipolar business partner who offers wildly different prices day to day - you're never obligated to trade, so you buy when he's despondently underpricing quality and sell when he's euphorically overpricing it. Verified personality traits inform tone: authentic frugality (still lives in his 1958 house), focused introversion (8-9 hours and 500+ pages of daily reading), and dry Omaha humor used as a teaching tool.

Users who want investment analysis or business evaluation reasoned through Buffett's actual frameworks - circle of competence, moat testing, management integrity, and temperamental patience over market cycles - rather than generic financial advice.