From takeoff to freefall – 5 scenarios for the markets when everyone is betting on a rally

History shows that big shocks rarely come when fear prevails. They come when doubt has all but disappeared.

Ushering into 2026, the picture is almost unanimous: Wall Street, major investment agencies and market “gurus” see a continuation of the rally, strong corporate earnings, artificial intelligence transforming the economy and a Federal Reserve ready to support if needed. It’s not that the risks are ignored; they are simply considered manageable.

This is the reason why 2026 is not shaping up to be an “average” year. It’s a year of extreme divergences. From takeoff scenarios to violent deleveraging scenarios, markets will be forced to choose a narrative.

And the more unified the consensus seems today, the wider the range of possible outcomes becomes.

The takeoff scenario

The main narrative on Wall Street is clear: the bull market continues. Forecasts call for a fourth consecutive year of growth in the S&P 500, something that has been happening for almost two decades. The median analyst estimate shows a rise of around 9%-11%, with corporate profits remaining the main driver.

Artificial intelligence is at the center. Investments in data centers, chips and infrastructure promise productivity gains that have not yet been fully reflected in the macroeconomic data. In this scenario, Alphabet surpasses Nvidia in market capitalization, not because Nvidia is weakening, but because Alphabet combines AI with cloud, advertising, autonomous driving and new technology fields. Markets reward scale and diversification.

This scenario is based on an assumption: that the AI revolution is not a bubble, but a structural transformation. If confirmed, 2026 could become a year that will resemble more the beginning of a new cycle than the end of the previous one.

The Silent Slowdown

But there is also a more insidious scenario, less spectacular but equally critical. Markets continue to rise, but at a much slower pace. The global economy is slowing, with the OECD estimating growth below 3%, while consumption is holding up but profit margins are starting to come under pressure.

In this environment, indices remain near historical highs, but the dynamics are changing. The rise is becoming more selective, volatility is increasing and markets are becoming more sensitive to negative surprises. It is the classic late-cycle bull market: it does not collapse, but it does not forgive mistakes.

The problem with this scenario is that it is difficult to recognize in time. There is no clear “break”. There is only a gradual loss of momentum, which many confuse with a healthy correction.

Policy fallacy

A third scenario revolves around monetary policy. Markets enter 2026 having priced in the Federal Reserve to be ready to support the economy if things get tough.

But if inflation proves more persistent or if the Fed chooses to keep interest rates higher for longer, the repricing could be abrupt.

In this scenario, we are not talking about a 2008-style financial crisis. We are talking about a slow-motion sell-off, with pressures on high-value stocks, private credit, and markets that have relied too heavily on cheap liquidity. The damage comes not from a shock, but from the failure of expectations.

Geoeconomic Accident

The fourth scenario starts outside the markets, but ends up in them. US tariffs are already at their highest level since the 1930s, while the trade truce with China remains fragile. The conflict is no longer just about trade, but also about technology, defense and energy security.

If there is an escalation — whether through new tariffs or restrictions on critical technologies such as AI chips and quantum computing — markets will be faced with a risk that they are not currently pricing seriously. Europe, caught between the US and China, will be among the most vulnerable.

Freefall

The most extreme, but also the most dangerous, scenario is the one that almost no one considers mainstream. The investment frenzy around AI is not translating into profitability at the pace expected.

At the same time, cracks are appearing in the credit market—in commercial real estate, private credit, and heavily leveraged businesses.

When these two come together, deleveraging can be violent. Not necessarily catastrophic, but powerful enough to overturn the dominant narrative. The dangerous element is not the scenario itself, but the fact that it is not on the radar of most investors.

2026 will not be judged by whether markets rise or fall a few points. It will be judged by which narrative prevails in a world where almost everyone agrees. And history shows that when optimism becomes universal, the distance between takeoff and free fall becomes dangerously short.