A.I. companies are buying up memory chips, causing the prices of those components — which are also used in laptops and smartphones — to soar.

US markets went sideways yesterday. As expected, the Federal Reserve kept rates on hold. The {S&P 500 touched 7 000 points for the first time, but finished marginally lower at 6 978. Drat.

The promise of smart wearables is often talked up, and while there have been some impressive innovations, we are still not ...