There is some economic justification behind that optimism. US growth remains firm, corporate revenues are expanding, and earnings revisions have held up unusually well.

Consensus expects roughly 25% to 27% year-on-year S&P 500 earnings growth in Q3, depending on the cut of the data. On the surface, that is the sort of number that makes a record-high equity market look almost modest.

The earnings boom is doing a fairly convincing impersonation of an earnings oligopoly.

Takeaways by Dark Side of the Boom™

• Europe finally found a pressure valve. Marine Le Pen’s shadow budget helped compress French spreads, cool the worst of the sovereign panic and take some heat out of global yields.

• Wall Street used the breathing room. The S&P 500 pushed to a fresh record as investors leaned into pre-earnings optimism and another powerful leg of the AI trade.

• The earnings headline is spectacular, but the engine room is narrow. Q3 S&P 500 EPS growth is expected near 25%–27%, yet AI infrastructure names are doing most of the lifting.

• Micron and Nvidia are carrying an extraordinary load. Together they are expected to generate more than a third of index earnings growth, while the median stock looks closer to single-digit growth.

• The bond market has paused, not surrendered. The equity rally can live with high yields far more comfortably than the old playbook suggests, but another violent acceleration in the long end would put that new correlation regime back under interrogation.

Earnings Optimism Completes the Feedback Loop

After a stretch of sovereign selling that had started to feel like Red October for the bond market, Marine Le Pen’s shadow budget gave investors something they had been desperately hunting for: evidence that politics can still bend when the bond market starts leaning on the door.

French yields eased, the OAT/Bund spread compressed sharply, and some pressure eased from the global duration trade. Nothing has been solved; the French election remains a long way off, and one calmer session does not erase the fiscal arithmetic, but markets do not always need a cure. Sometimes they just need the bleeding to stop.

That is what Turnaround Tuesday delivered. After days of bond-market punishment, Marine Le Pen finally gave investors something they could trade on: a pause in the fiscal panic, even if it came in the shadow-budget variety.

French spreads narrowed because the market saw a more fiscally disciplined message, and that was enough to take some of the heat out of the broader European bond complex. Nothing has been solved; the election is still a long way off, and France’s fiscal arithmetic remains ugly, but markets do not always need a cure. Sometimes they just need someone to stop throwing gasoline on the fire.

That matters beyond Paris because the signal is simple: once sovereign stress becomes disorderly enough, politics has to respond. Tuesday’s relief was the market acknowledging that the feedback loop still works. Bond pressure forced a reaction, the reaction bought time, and the long end briefly loosened its grip.

The S&P 500 pushed to a fresh all-time high, its first record since August, as slightly lower yields, easier financial conditions and another burst of AI enthusiasm gave investors enough confidence to lean back into risk ahead of earnings season. Nvidia’s market value is closing in on $6 trillion, AMD is talking about very strong chip demand for years to come, and the market is heading into Q3 reports with the view that Corporate America can still carry expensive energy, elevated rates and a geopolitical backpack full of bricks.

There is some economic justification behind that optimism. US growth remains firm, corporate revenues are expanding and earnings revisions have held up unusually well.

AI infrastructure stocks are expected to drive more than half of S&P 500 EPS growth this quarter, while the top 10 contributors account for more than two-thirds of the total increase. Micron and Nvidia alone are expected to deliver more than one-third of index earnings growth.

That is an extraordinary concentration of horsepower.

Two semiconductor companies are effectively carrying a piano up the stairs while most of the building applauds from the landing.

Micron has already provided the opening act with year-on-year earnings growth above 1,000%, a beat and strong forward guidance. Nvidia remains the market’s centre of gravity, and the broader AI complex continues to trade as though this capex cycle is measured in years rather than quarters.

The awkward number is not the 27% headline.

It is the roughly 9% growth expected from the median stock.

That gap tells you exactly what this market is asking investors to believe. The index can keep making records as long as the AI generals continue taking enough territory to compensate for an army moving much more slowly behind them.

For now, investors are willing to make that trade because the companies doing the heavy lifting are unusually well equipped to carry the rates burden.

The AI buildout is becoming increasingly debt-funded, and the amount of issuance coming from the hyperscalers is enormous, but that distinction matters. These companies are issuing debt because they can, not because their growth models depend on cheap money to stay alive. Current yields remain well within historical norms and are nowhere near restrictive enough to force a strategic retreat in investment.

They have enormous cash flows, fortress balance sheets and capex plans that have become remarkably insensitive to rates. Higher yields increase the financing bill, but they have not yet changed the decision to build.

The landlord can raise the rent and the biggest tenants are still wealthy enough to add another floor.

That is why the historical relationship between higher yields and weaker equities has become much less dependable. This bond move is no longer simply about price discovery. It is increasingly about correlation discovery.

The old manual was straightforward: yields rise, discount rates go up, duration gets hit, expensive growth stocks wobble and eventually the equity market pays the bill. That relationship has not disappeared, but the transmission mechanism has changed when the companies carrying the index possess balance sheets capable of absorbing much more punishment than yesterday’s growth cohort.

Treasury yields backed away from multi-decade highs as French spreads narrowed and the European sovereign panic cooled, giving equities enough breathing room to make another run. Rate-hike expectations barely moved, which tells you this was not really a Fed story. It was a term-premium story, with France temporarily taking its boot off global duration.

That is an important distinction because equities can learn to live with high yields if those yields stop sprinting higher every few sessions. Companies can plan around an expensive cost of capital. Markets can price it. What becomes much harder to absorb is a long end that keeps changing the rules of the game halfway through the quarter.

If AI spending continues at anything close to this pace, US growth stays firm and fiscal issuance remains heavy, a 30-year Treasury yield above 6% no longer belongs exclusively in the tail-risk drawer. The market has already demonstrated that it can tolerate rates at levels many thought would have broken growth equities months ago, but there is a difference between carrying a heavy backpack and having someone keep adding bricks while you climb.

Even the strongest balance sheets eventually notice gravity.

For now, though, the earnings story is doing enough to offset the bond story, and that is precisely why this reporting season matters.

The market does not merely need another blowout Nvidia quarter. It needs evidence that profit growth is beginning to spread beyond the handful of companies already carrying the index. The bullish wager is that a resilient US economy and strong corporate profitability eventually allow the foot soldiers to catch up with the generals.

That broadening has not happened convincingly yet.

The median company is still looking at the summit through binoculars.

That is the tension underneath the celebration.

Wall Street can live with higher rates when earnings are growing fast enough to absorb them, and right now AI is doing a remarkable job of keeping that equation together. But the further the S&P climbs, the more the market needs the earnings story to broaden rather than simply become even more concentrated at the top.

Europe’s pause helps. Lower sovereign stress helps. A softer dollar helps. Oil behaving itself helps.

But none of those things turns the bond storm into ancient history.

Le Pen may have bought France some breathing room, and Wall Street used it to hang another record on the wall, but the underlying test remains the same: AI still has to carry the index, the broader earnings cycle still has to catch up, and the bond market still has its hand hovering over the light switch.