I'll just admit here that when I hit 50, I adjusted my long-term investments such that I have some bonds, and in fact some are long-term, so they would be vulnerable to rate hikes. So while this was a "safety" move, I am exposed to one thing, and that one thing is 8 rate hikes. When the cost of money goes up, stocks and bonds both will react, downward, at the same time.
In my Roth I am running something commonly referred to on the internet as "Hedgefundies Excellent Adventure" which is basically a 50/50 mix of UPRO/TMF. These are 3X leveraged ETF's. UPRO is 3X the S&P500 and TMF is 3X the trading price of 30 year treasuries. You can substitute something else for the TMF portion, but it becomes a really difficult choice for a variety of reasons. So this also is very exposed to 8 rate hikes right now. I'm not afraid to substitute the TMF, and in fact I did, but TMF got so cheap i have been reaccumulating it.
In other news, it's a new year, and I bought my allotment of treasury I-bonds today. paying 7%.