“Fitch’s decision does not change what Americans, investors, and people all around the world already know: that Treasury securities remain the world’s preeminent safe and liquid asset, and that the American economy is fundamentally strong,” Yellen added.

Source: https://alaska-native-news.com/gops-fiscal-vandalism-and-political-sabotage-prompts-second-ever-us-credit-downgrade/69225/

Treasury securities also offer competitive rates.

Source: https://ktar.com/story/5487504/bank-rates-are-up-how-to-avoid-leaving-money-on-the-table/