Why is USDT more expensive than USD?

I've noticed that USDT, the cryptocurrency, often trades at a higher price than its underlying asset, the US dollar. This observation has piqued my curiosity. Could you please explain the reasons behind this apparent premium? Is it due to market forces, supply and demand imbalances, or perhaps some unique characteristics of the cryptocurrency market? I'm particularly interested in understanding the mechanisms that drive this price difference and how it impacts investors and traders in the crypto space. Thank you for considering my question and for any insights you can provide.