Boring is beautiful this year as investors rush to the relative safety (and higher yields) of exchange-traded funds that hold short-term treasuries. But what exactly is inside them? And what are the risk-rewards of the most popular ones?

On this episode of Trillions, we look at cash-like ETFs with reporter Katie Greifeld and James Seyffart of Bloomberg Intelligence. We also dig into inflation and the world of currency ETFs.