Built for the DECA Stock Market Game
Short the spike.
Every day a handful of stocks spike double digits. Most give it back. Zenith ranks the day's biggest gainers, tracks their streaks, and drops a quant short thesis on the top five at 3:30 ET, while your order still fills at today's close.
The session's top five
Sep 25, 2026- #1AIFUAIFU Inc./10+32.1%$12.02
- #2SLMTBrera Holdings PLC/10+27.1%$4.78
- #3USDEStablecoinX Inc./10+21.3%$17.25
- #4SHMDSCHMID Group N.V./10+20.7%$4.37
- #5YDESYD Bio Limited/10+20.1%$5.73
Real data from the latest session. Short scores unlock with Pro.
Open the screenerBuilt around the 4:00 close
In the DECA Stock Market Game, every order placed during the day fills at that day's 4:00 PM close. Zenith ranks the gainers all session, then posts its analysis at 3:30 so you have half an hour to pick a short and place the order.
- 9:30 – 4:00 ET
The screener
Every trading day, Zenith ranks the biggest US gainers by percent gain, with price, volume, market cap, and how many days each has run in a row.
- ~3:30 PM ET
The 3:30 drop
About 30 minutes before the close, the quant engine drops a short thesis on the top five: the catalyst behind the spike, how similar spikes have played out before, and a short-rating out of 10.
- 4:00 PM ET
The close
In the DECA Stock Market Game, orders placed before 4:00 PM ET fill at that day's closing price. Read the drop and get your order in before the close.
Zenith Pro
Why it spiked, and how it looks as a short
Anyone can see what spiked. Pro adds a written short thesis on each of the day's top five — every figure computed by a quant engine from public market data, with AI used only to phrase the findings — posted at 3:30 before the close.
- Everything in Free account
- Quant short thesis on the top 5, every trading day
- The 3:30 drop email: top movers + thesis in your inbox before the close
- Unlimited history: all of Zenith's past trading days
#1QNTM+64.2%Quantum Compute Corp
3Short 7/10Why it spiked: QNTM is selling new shares — a 424B5 filed with the SEC Sep 8 shows a dilutive stock offering / capital raise.
QNTM is up 64.2% today, its third straight day on the board, even though the company is raising cash by selling new stock into the run. Spikes tied to share offerings usually fade once the dilution sinks in, which makes this a fade-friendly setup. On the chart this is a recovery, not a breakout — it's climbing back into a range it already traded this quarter, still ~38% below that prior peak. Historical base rate (~1yr of micro-cap, relvol 20–100, wide-range gainers, n=64): closed LOWER the next session 68% of the time, median next-day move -4.2%. Sizing the payoff: when this setup fades it typically gives back ~11.3%, and when it keeps running it typically adds ~9.8% — netting out to an expected -4.5% next-day move in the short's favor.
Illustrative example — fictional ticker, real thesis format.
The screener is free. The edge is $9.99.
Anyone can see the day's biggest gainers. Pro breaks down each of the top 5 as a short candidate: the catalyst behind the spike, and how similar spikes have played out before. In your inbox by 3:30, before the close.
Browse
$0 · no account
- Today's full screener: the day's biggest gainers, ranked
- Filters by price, market cap, and ticker search
- Live market status & close countdown
Free account
$0 · forever
- Everything in Browse
- Interactive price charts, built for all levels
- Consecutive-day streak badges
- Favorite tickers, pinned to the top of your screener
- The last 5 trading days of history
Pro
$9.99/mo
- Everything in Free account
- Quant short thesis on the top 5, every trading day
- The 3:30 drop email: top movers + thesis in your inbox before the close
- Unlimited history: all of Zenith's past trading days
Frequently asked questions
How does shorting actually work?
Shorting is a bet that a price will fall. You sell borrowed shares today and buy them back later. If the price has dropped, the difference is your profit; if it rises instead, that difference is your loss. In the game it's one step: place a short order, and you gain when the stock closes lower than where you shorted it.
Why short the day's biggest gainers?
Big one-day spikes tend to give back ground in the days after, especially in smaller stocks running on hype instead of numbers. Not always, which is the point of the thesis: it separates spikes with something underneath from spikes running on air. You still make the call.
Where do the theses come from?
A quantitative engine we built. For each of the top five it works from public market data — filings, how similar past spikes played out, price and volume — and scores the setup out of 10. Every number in a thesis is computed by that engine. A language model is used only to phrase the finished findings in plain English: it never picks the stocks, never produces or changes a figure, and the sentences carrying the odds and the risk warnings come straight from the engine. What the engine does and doesn't claim, and where it gets things wrong, is written up at /engine.
How do trades work in the DECA Stock Market Game?
It's an end-of-day game. Any order you place during market hours fills at that day's 4:00 PM ET closing price; place it after the close and it fills at the next day's close. Orders stay pending and cancelable until the close. That's why the thesis drops at 3:30, while you can still act on it.
Is using Zenith allowed in the competition?
Zenith is a research tool: a screener plus analysis, like reading a finance site before you trade. You place your own trades in the official game. Rules can vary by chapter and event, so check yours if you're unsure.
What do I get without paying?
The full screener — today's ranked gainers — with no account at all. A free account adds price charts, streak badges, favorite tickers pinned to the top of the screener, and the last 5 trading days of history. Pro ($9.99/mo) adds the daily short theses, the 3:30 drop email, and unlimited history.
Is this investment advice?
No. Zenith is built for a simulated trading competition and for learning how markets move. Nothing here is advice about real money.