The Indicator from Planet Money The Indicator from Planet Money

Polymarket bots, lithium found: lots!, marathon shoe thoughts

May 1, 2026 · 8m

Summary

The hosts discuss three economic indicators: a study revealing that bots and top traders dominate profits on Polymarket; the US Geological Survey’s discovery of 2.3 million metric tons of lithium in Appalachia; and the economics of high-tech running shoes following a sub-two-hour marathon record. They explore how automation impacts prediction markets, the environmental costs of domestic lithium mining, and how engineered sports gear drives consumer anxiety and spending.

Topics discussed

Introduction and episode overview Sponsor messages: IXL, Dell, and Edward Jones Polymarket profits and the dominance of trading bots Major lithium discovery in the Appalachian region Sub-2-hour marathon and engineered sports equipment Outro, credits, and final sponsor messages
Listen ad-free on Castria