The “Taylornomics” even caught curious attentions from the US Federal Reserve, the country’s central bank, as the American pop icon Taylor Swift’s 20-city Eras Tour is on track to become the biggest in concert history, potentially grossing $1 billion. It’s filling football stadiums that hold more than 70,000 people, and Swift is often staying in town for several days, giving local businesses time to soak up the money.