If your portfolio felt a little lighter last week, you might want to check if you missed the rocket ship. A wave of momentum—the kind that makes traders sit up straight—swept through large-cap stocks, driving standout gains across everything from quantum computing to car rentals.
It wasn't just one story. Short squeezes, defense contracts, clinical trial results, and even some old-fashioned analyst optimism all played a part. These ten stocks were the top performers from April 13 to April 17. Let's break down what sent them flying and whether the fuel is still in the tank.
Avis Budget Group, Inc. (CAR) absolutely ripped, jumping 71.48%. The primary driver here wasn't some revolutionary new rental car tech—it was a classic, gut-wrenching short squeeze. When too many traders bet against a stock and it starts to move up, they have to buy shares to cover their positions, which pushes the price even higher. It's a feedback loop that can create sudden, dramatic moves like this one.
Over in the realm of futuristic tech, IonQ, Inc. (IONQ) increased 62.86%. The catalyst was concrete: the company landed a contract in the Defense Advanced Research Projects Agency's Heterogeneous Architectures for Quantum program. When the Pentagon starts writing checks for your quantum research, investors tend to notice.
Revolution Medicines, Inc. (RVMD) offered a more traditional biotech boost, rising 12.42% after announcing results for its Phase 3 RASolute 302 clinical trial evaluating daraxonrasib. The company noted that all progression-free survival and overall survival endpoint results are considered final, which is the kind of clarity the market likes to see.
Sometimes, all it takes is a few Wall Street analysts changing their minds. Credo Technology Group Holding Ltd (CRDO) jumped 29.75% this week after multiple analysts raised their price targets on the stock. It's a reminder that sentiment shifts can be powerful catalysts on their own.
The narrative around nuclear power got a space-age upgrade, helping Oklo Inc. (OKLO) rise 33.35%. The CEO framed the company's nuclear reactors as essential infrastructure for future space missions, and investors leaned into the space-and-defense story. When the pitch is "powering everything that's cool in space," it's hard not to get a little excited.
In fintech, Affirm Holdings, Inc. (AFRM) increased 28.12%, while Robinhood Markets, Inc. (HOOD) soared 33.22%. For Robinhood, the boost came from a bullish analyst outlook from Bernstein and a broader rebound in the cryptocurrency market. When crypto rallies, Robinhood's trading activity—and its stock—often gets a tailwind.
Tempus AI, Inc. (TEM) spiked 31.34% on some decidedly un-sexy but very important news: a commercial expansion with Predicta Biosciences for a co-branded whole-genome sequencing assay. It's intended for comprehensive genomic characterization of hematologic malignancies and measurable residual disease monitoring. In plain English, it's a big step in commercializing their AI-driven health data platform.
And then there's MicroStrategy Incorporated (MSTR), which gained 31.86%. The company is famously one of the largest corporate holders of Bitcoin, so its fortunes are often tied to the crypto market's mood. Last week, that mood was decidedly upbeat.
Rounding out the list, Summit Therapeutics Inc. (SMMT) increased 28.32%.
So, what's the takeaway? Last week's rally was a reminder that big moves can come from anywhere—a short squeeze in a rental car company, a government contract for a quantum computer, or an analyst upgrade for a chip stock. It wasn't a one-sector story. The question for investors now is whether these are one-week wonders or the start of something more sustained. With catalysts ranging from final clinical data to the whims of the crypto market, the answer is probably a little bit of both.
