Hey Financial People: The interest rate on 3 month Treasury Bills just went to -0.01%. Why would anybody, or any institution, buy them? Why not just hold on to your capital as cash? Or does a negative interest rate not mean what I think it means?

Hey Financial People: The interest rate on 3 month Treasury Bills just went to -0.01%. Why would anybody, or any institution, buy them? Why not just hold on to your capital as cash? Or does a negative interest rate not mean what I think it means?

Is there a way I can buy the 30 year swap for my personal account? Right now the 30 year swap is trading at ~4.03...I'd love to make a long term bet where I pay out 4.03% fixed rate and receive floating. The irony is that while I work for a bank and can make that bet in size on my book, I want to do it for personal account and have no idea as to where/why the mechanics of how it would work. Would the account get marked to market/margin called? Is there a way I can buy that swap for straight cash (not sure how this would work, as how could a counterparty take on someone's personal credit risk?).

Is there a way I can buy the 30 year swap for my personal account? Right now the 30 year swap is trading at ~4.03...I'd love to make a long term bet where I pay out 4.03% fixed rate and receive floating. The irony is that while I work for a bank and can make that bet in size on my book, I want to do it for personal account and have no idea as to where/why the mechanics of how it would work. Would the account get marked to market/margin called? Is there a way I can buy that swap for straight cash (not sure how this would work, as how could a counterparty take on someone's personal credit risk?).