Visa at 28x earnings: "wonderful company at fair price" or just expensive? Running it through Buffett's framework

Visa is the stock where everyone agrees on the quality and argues about the price. Here's what the numbers actually say. The moat case Network effects are the core: more cardholders → more merchants accept Visa → more people want Visa cards. That loop has compounded for 60 years across 200+ countries. Moat durability estimate: 20+ years. The financials reflect it: \- Gross margin: 97.78% \- Operating margin: 67.35% (sector median: \~30%) \- ROE: 60.35% \- Free cash flow: $20.84B - importantly, this exceeds net income, which is the quality signal. Earnings can be shaped by accounting (cash flow is harder to fake). The valuation problem Current P/E: 28.48x. Forward P/E: 22.02x. PEG: 1.44x. FCF yield: 3.35% - below the 5% threshold most serious Buffett disciples want before initiating a position. One wrinkle the bulls often skip: Visa is a net debtor. $13.91B cash against $23.98B total debt = -$10.06B net position. In a higher-rate environment, that refinancing risk is real, even with $20B+ in annual FCF. How Buffett's framework actually scores it "Wonderful company at fair price" - not a bargain, but not a pass. The logic: at 35% earnings growth you're paying 1.44x the growth rate. For a business with this capital efficiency and moat durability, that's within acceptable range. Ackman's framework goes further - rates it A+ as a concentrated-bet candidate given the #1 market position and pricing power. Dalio's framework - macro lens is the dissent: net debtor position + elevated multiples = three-quarter weight, not full conviction. My summary: This isn't a deep value opportunity. FCF yield at 3.35% won't satisfy margin-of-safety investors. But for those whose framework includes quality compounders at fair prices - Buffett's Berkshire has held both Visa and Mastercard for years. That's a data point. Entry zone per the technical setup: $320-$330. Support at $310, resistance at $355. R:R is 1:1.6. Question: how do you all handle the margin of safety problem with wide-moat compounders? Strict FCF yield threshold, or does moat durability change the equation? (Screenshots not allowed unfortunately, but this analysis came from a multi-agent framework I've been building that runs stocks through Buffett/Ackman/Dalio investor models. Visa scored A / A+ / B+ respectively, landing bullish at 84% confidence. Happy to share the full research if anyone's curious.)