Which ETF has a negative beta?

I'm curious, could you please clarify which ETF specifically is known to have a negative beta? In the world of finance, ETFs, or Exchange-Traded Funds, typically aim to track the performance of a particular index, asset class, or basket of securities. However, the concept of a negative beta is intriguing, as it implies that the ETF in question moves inversely to the overall market. Is there a particular sector, asset class, or strategy that this ETF focuses on that would explain its negative beta characteristic? And are there any potential risks or considerations investors should be aware of when investing in an ETF with a negative beta?