The Takeaway
GenAI value creation has been exceptional, with the Morningstar PitchBook GenAI 20 Index delivering a 179.5% annualized return since its June 2023 inception.
GenAI returns are power-law distributed, with OpenAI, Anthropic, and Databricks accounting for more than 80% of cumulative index return.
Valuation signals from category leaders like OpenAI transmit across the GenAI ecosystem, influencing how other companies are priced - a phenomenon we describe as "TAM drafting."
Generative artificial intelligence (GenAI) has moved rapidly from technological breakthrough to economic force. In just a few years, a relatively small group of venture-backed companies has come to define the pace and scale of AI innovation, influencing capital allocation across the global economy. The Morningstar PitchBook GenAI 20 Index was designed to track the largest and most influential GenAI companies, many of which remain private.
This paper examines the index through three lenses: the asymmetric risk profile produced by episodic private-market repricing; the power-law distribution of returns and the dominance of a narrow set of category leaders; and the transmission mechanism we describe as TAM (Total Addressable Market) drafting, through which valuation signals from key reference assets propagate across the ecosystem. Taken together, these perspectives help explain how GenAI is being priced - and what that pricing reveals about a market still in formation.
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