So, you know that whole AI boom? It turns out the real money isn't just in the fancy software and chatbots. It's in the physical stuff that makes them run—the chips, the servers, and crucially, the memory. And right now, SanDisk Corp (SNDK) is having a moment that can only be described as spectacular. The stock is up more than 159% this year and has rocketed an eye-watering 1,184% over the past 12 months. On Monday alone, it was up another 8%.

What's fueling this? According to Lucas Downey, co-founder of MoneyFlows.com, there's a major institutional shift happening. "Big money" is deserting software-as-a-service (SaaS) companies and piling into the physical infrastructure that powers AI. "Money has been literally nonstop flowing into the sector," Downey noted in a recent interview.

The performance gap tells the story. While SanDisk soars, the iShares Expanded Tech-Software Sector ETF (IGV) has cratered 17.33% this year. Downey attributes this to a two-year "bottleneck" in AI chips and storage. When you have a gold rush, you want to be the one selling the shovels and pickaxes. SanDisk is in the shovel business.

The fundamentals backing this move are, frankly, explosive. SanDisk's revenue is projected to double to $15.2 billion in 2026. Even more staggering, operating income is expected to hit $7 billion. That's a tenfold increase from 2025. Goldman Sachs analyst Ryan Hammond points out that even with this run, memory stocks like SanDisk trade at a discount. The stock trades at just 8.8 times forward earnings, well below the broader market average. It's a growth story that, for now, the market isn't pricing at a typical growth premium.

Of course, no rally this big happens without turbulence and skeptics. The ride hasn't been perfectly smooth. Shares dipped during a broader tech selloff on March 3, fueled by Middle East tensions and rising oil prices. More pointedly, the well-known short-seller Citron Research announced a short position on February 26, arguing the NAND memory cycle is peaking.

Citron, led by founder Andrew Left, issued a clear warning: the competition is fierce. They highlighted Samsung Electronics Co Ltd (SSNLF) as a core threat, noting that "Samsung has a 30-year history of choosing market share over margins." In other words, Samsung could flood the market with supply, driving down prices and spoiling the profit party for everyone else, including SanDisk.

So here's the picture: you have a stock on an absolute tear, fueled by a seismic shift in where institutional capital wants to play in the AI revolution. The numbers supporting the move are huge and growing. Yet, it still looks cheap on an earnings basis, and there are credible voices warning that the cycle may have already hit its peak. It's the classic market battle between a powerful, fundamental trend and the fear that it might have gone too far, too fast. For now, the trend is winning, and SanDisk shareholders are along for a wild ride.