CONCEPT
Durability Discount
The one-to-two percentage point reduction to the discount rate of ecosystem-dependent companies, reflecting moat resilience that AI strengthens rather than threatens.
The durability discount is the explicit downward adjustment to the standard CAPM-derived discount rate for companies whose competitive moats have been preserved or strengthened by the AI revolution. The magnitude — typically one to two percentage points — depends on the depth and breadth of the company's ecosystem advantages. A platform company with deep data moats, extensive marketplace network effects, and decades of accumulated regulatory trust warrants the upper end of the range; a company with moderate ecosystem advantages warrants the lower end. The discount reflects the recognition that ecosystem-based competitive advantages are more durable than code-based ones, and the associated cash flows therefore warrant lower required returns than the sector-average CAPM rate would imply.
In The You On AI Field Guide
The discount is the symmetric counterpart to the disruption premium. Together they implement the discount rate asymmetry the AI transition requires. Without both adjustments, the analyst produces intrinsic value estimates that systematically overvalue code companies and undervalue ecosystem companies — precisely the inverse of what the disruption demands.
The justification