I absolutely do not recommend shorting long-dated bonds. However, if I did want to do so a a retail investor, I would maintain a rolling short in CME treasury futures. Longest future is UB. You’d need to roll your short once every 3 months, and you’d also want to adjust the size each time, given that the changing CTD means that the same number of contracts doesn’t necessarily mean the same amount of risk each expiry.
I absolutely do not recommend shorting long-dated bonds. However, if I did want to do so a a retail investor, I would maintain a rolling short in CME treasury futures. Longest future is UB. You’d need to roll your short once every 3 months, and you’d also want to adjust the size each time, given that the changing CTD means that the same number of contracts doesn’t necessarily mean the same amount of risk each expiry.