The S&P 500's Safety Net Is Disappearing. History Says Investors Shouldn't Ignore It.
2026-10-09 12:15
•David Dierking •The Motley Fool
•••••• • Axe Cap view
S&P 500’s Cushion Is Fading — What It Means for SA Investors
Rising U.S. Treasury yields challenge U.S. stocks, but strong AI-driven earnings growth keeps markets buoyant—a mixed signal for South African investors.
For years, U.S. stocks enjoyed a sweet setup with ultra-low interest rates keeping borrowing cheap and valuations inflated. Now, 10-year Treasury yields above 5% are cutting into that advantage. That means the safety net cushioning equities is thinning. Yet, AI-led earnings growth is propping up indices like the S&P 500, pushing them near record highs despite more expensive debt. For South African investors, this dynamic matters for two reasons. First, the USD/ZAR often tracks global risk sentiment, so higher U.S. yields and volatility can strengthen the dollar against the rand—pressure on local importers and inflation. Second, local financial counters like Standard Bank and FirstRand face margin pressure if rates move aggressively or if global growth slows. Still, healthy earnings growth from U.S. tech giants provides some support to local stocks with global exposure, like Naspers and Prosus. If earnings falter or rates spike further, this balance will tip. this is just our opinion and not financial advice
We’re watching Rand strength carefully and prefer to hold leaders with global earnings—Naspers and Prosus—while trimming exposure to local banks for now until rate direction clears. Any sharp USD/ZAR moves would trigger more active portfolio shifts.
- Naspers
- Prosus
- Standard Bank
- USD/ZAR
- U.S. Treasury yields rise faster than expected
- Global tech earnings disappointment
6/10
U.S. stocks have benefited from ultra-low interest rates for over a decade, but Treasury yields are now at two-decade highs (5.32% and 5.70%), reducing the tailwind for equities. However, strong AI-driven earnings growth is offsetting rate pressures, allowing the S&P 500 to hold near all-time highs. While the margin for error is thinning, long-term investors should focus on fundamentals and earnings growth rather than short-term rate movements.
Our take is based on reporting first published by The Motley Fool.