Been thinking about what could actually trigger a stock crashing scenario in the coming months, and honestly, tariffs might not be the real threat everyone's focused on.

Look, the S&P 500 put up solid numbers last year - nearly 18% gains. But here's what's wild: half of that move came from just seven stocks. Nvidia alone was responsible for 15% of the entire index's return in 2025. When you've got that kind of concentration, you're basically betting everything on one narrative - and that narrative is generative AI.

The problem is the math doesn't work yet. OpenAI is burning through $14 billion annually. Yeah, the chip and data center companies are printing money selling shovels to the AI goldrush, but the actual AI companies trying to build consumer products? They're still struggling to turn these language models into real business models. It's speculative as hell.

Meanwhile, the CAPE ratio - basically a measure of how expensive stocks are relative to historical earnings - just hit 40. That's a level we haven't seen since the dot-com bubble peaked in 2000. And all those massive data center investments? Eventually those depreciation expenses hit the books and start dragging down corporate earnings. That's when the market gets skeptical, and that's when you could see a stock crashing correction.

But there's something else brewing that might be even more dangerous. The dollar got hammered last year - down 8% against the basket of major currencies, and nearly 15% weaker against the euro. When the dollar weakens, your stock market gains actually shrink in real terms. That 17.9% return? A chunk of it just evaporated in currency terms.

Trump's pushing the Fed to cut rates, which is basically politicizing monetary policy. Combined with the ballooning deficit headed toward $1.9 trillion, there's real uncertainty about whether the dollar can maintain its strength. If foreign investors lose confidence in U.S. currency stability, you could see capital flight that triggers a stock crashing event way faster than any tariff war.

The market has always recovered from crashes historically, but the next 12 months could get messy. Diversification across asset classes is probably smart right now - you don't want too much exposure to any single sector when valuations are this stretched and macro conditions are this uncertain.