If you’re surprised by how well the stock market is doing, so is Jamie Dimon

And yet the S&P 500 is up nearly 80% over the past five years, the Nasdaq up more than 86%. Even with the global oil supply shock in over the past three-plus months, Wall Street has remained bullish—thanks, in large part, to the promise of artificial intelligence. If investors are surprised by seeing their portfolios continue to tick up in the face of such headwinds, so is JPMorgan Chase CEO Jamie Dimon. The Wall Street veteran admitted he’s a little taken aback by the market’s apparent complacency at present. Speaking in a discussion held by the Council on Foreign Relations,…