JPMorgan economists estimate that the basket of stocks they use as a rough gauge of AI’s market impact is now worth about 44% of the S&P 500’s total market cap, up from 26% in 2022.

Using a basket of 30 AI stocks picked by the bank’s equity analysts as a barometer of AI, the economists find that American households have seen their aggregate wealth go up by about $5 trillion over the last year as a result of AI, they reported in a note published Thursday.

They also estimate the surge in stock market wealth could raise annualized US consumer spending by some $180 billion, due to wealth effects.

JPM acknowledges some uncertainty around this estimate, noting that the spending impact could be lower “if the wealth gains are accruing disproportionately to upper income households with lower [marginal propensity to spend].”