Scott Stevenson posted a chart that was eye-opening, especially for myself who’s been in the market for three decades. If you're younger than 45, this is the first time in your life you're living through a genuine rising interest rate environment.
The last time was 1960 to 1980. It means an entire generation of investors, advisors, and portfolio managers built their instincts in a market that has behaved in one direction, and that direction may have just changed.
The whole career of a 40-year-old trader was one long tailwind
Look at the chart. The 10-year yield peaked near 16% in 1981 and then spent roughly four decades falling, all the way to the sub-1% lows of 2020. Anyone who started investing after 1981 spent their entire career in a bond bull market where yields drifted lower, prices drifted higher, and "buy the dip in duration" worked almost every time. Refinancing waves, falling mortgage rates, rising asset prices, cheap leverage, all of it traced back to that one downward-sloping line.
Now look at the right edge of the chart. A 10-year sitting at 5.24%, with the line having climbed off that 2020 floor in one of the sharpest reversals on the entire page. That's the first chapter of something potentially very different, and almost nobody under 45 has any lived experience of what it feels like.
Why "the physics of the game" actually changes
Duration is rewarded. Longer bonds appreciate as yields fall, so holding more duration makes you look smart.
Leverage is cheap and getting cheaper. Refinancing at lower rates every few years became a standard playbook.
Valuations expand. Lower discount rates push up the present value of everything from stocks to real estate to private assets.
In a rising rate regime, every one of those tailwinds flips into a headwind. We've spent this year writing about exactly that: the worst quarter for the 10-year since 1994, mortgage lock-in, commercial real estate refinancing walls, reinsurers sitting on mark-to-market losses. They're all happening because the underlying regime they were built for has changed.
What the 1960-1980 stretch actually taught fixed income investors
Rates in that era didn't rise in a straight line. They climbed in waves, with sharp rallies in between that fooled plenty of people into thinking the worst was over. The lesson that stuck for bondholders was brutal and simple: in a rising rate, rising inflation environment, a fixed coupon gets eroded from two directions at once. The price falls as yields rise, and the purchasing power of the income you're collecting shrinks as inflation runs. Bonds earned a reputation in that era as something closer to a wealth destroyer than a safe haven.
That's directly relevant to the piece we just wrote about bonds needing an asterisk. Bonds alone don't protect purchasing power in a high and rising inflation regime.
But the starting point today is not 1960
This is where the history lesson needs some nuance, and it's the part that actually makes this interesting for fixed income investors. In 1960, yields were low relative to where inflation was about to take them, which is why bondholders got run over. Today, a 10-year at 5.24% is already paying a meaningful income cushion before the next move happens. We saw it in the TLT table and the J.P. Morgan scenario analysis: higher starting yields absorb a lot of price damage over time and turn multi-year holding periods positive even in rising rate scenarios.
What this could mean for how fixed income gets built
If the regime really has changed, a few ideas start to look less like preferences and more like necessities:
Duration becomes a decision, not a default. The reflex to extend maturity for yield pickup stops working when the trend is against you. Ladders, barbells, and short-duration sleeves matter more because they let you reinvest as rates move rather than locking in one bet.
Floating rate and short-term paper earn a permanent seat. We covered floaters versus T-bills earlier this year for this exact reason. When rates drift higher, instruments that reset with them keep pace.
Inflation protection gets taken seriously again. TIPS stop being an afterthought when inflation is a live risk.
Diversifying the regime risk itself matters. The trend-following analysis we covered showed that stacking a strategy that can profit in rising markets on top of bonds turned the worst inflation environment positive. That's the kind of thinking a 1970s portfolio would have needed..Starting yield finally does real work. For the first time in a long time, locking in 5%+ on high-quality paper is a legitimate part of the plan, which is the single biggest difference between today's rising rate environment and the one most people compare it to.
The bottom line
The most dangerous thing about this moment isn't the level of rates, it's that most people managing money today have never operated in a regime where rates trend higher for years rather than months. Every instinct built over the last forty years was trained on a market that rewarded the opposite behavior. That doesn't mean the next two decades will repeat the 1970s, history rarely repeats that cleanly, and today's yields give investors tools that 1960s bondholders didn't have. But "this fundamentally changes the physics of the game" is a fair description of what happens when the trend that defined your entire career quietly stops being the trend, and the investors who adapt first will be the ones who didn't assume the old rules still apply.