Top Stock Movers Today — September 17, 2026: Why AEMD, DTSS, BIAF, TURB & AIFF Surged

AEMD — Aethlon Medical Inc (+372.0%)

Aethlon Medical closed at $6.75, up 372% on volume of 20,473,957 shares — nearly five times its 20-day average of 4,260,493. The stock also hit a fresh 52-week high on the session, and the gap up from the prior close measured an enormous +500.7% at the open.

Why it moved: Multiple outlets confirmed the catalyst — Aethlon Medical announced a merger with North Immunology, accompanied by a $180 million financing plan. Headlines from TipRanks, Quiver Quantitative, Blockonomi, and Advfn all pointed to the same news. Merger announcements of this scale relative to a micro-cap company routinely trigger explosive single-day moves as traders reprice the combined entity's potential. Aethlon's market cap entering the day was just $4.8 million, so even modest deal-related optimism translates to dramatic percentage swings. AEMD had also appeared in this morning's premarket movers recap, signaling the move was already underway before the bell.

StockSetups technical picture: The RSI hit 85, which is deeply overbought territory (RSI above 70 typically signals a stock has moved fast and far in a short period). The ADX of 26 confirms a developing trend, though the moving-average stack remains mixed — a reminder that the underlying trend structure before today was not clean. StockSetups assigned a conviction score of 47/100 and a grade of C, reflecting the chaotic, news-driven nature of the move rather than a textbook technical setup. The RS rating of 97 and technical rank of 99 capture how far and fast AEMD outpaced the broad market today. The squeeze score of 68/100 is worth noting: with short interest of 461,661 shares and only 0.1 days to cover (meaning shorts could theoretically close their positions in about six minutes of average volume), the squeeze dynamic was more about momentum than a classic forced short-covering event.

Merger-driven micro-cap moves are among the most volatile and mean-reverting events in the market. Stocks like this frequently give back a large portion of the gain in the days that follow — particularly when the financing terms and deal structure are still being digested.

DTSS — Datasea Intelligent Technology Ltd. (+105.5%)

Datasea Intelligent Technology closed at $1.22, more than doubling (+105.5%) on volume of 12,302,582 shares — roughly 5.4 times its 20-day average of 2,259,460. The stock opened with a gap of +60.9% and continued higher through the session.

Why it moved: Datasea announced that its AI Agent Digital Marketing Services had entered scaled commercial deployment, with five customer agreements representing potential annualized service volume of up to approximately $89.4 million (RMB 600 million). Per PR Newswire and Stock Titan, fees across those agreements could reach as much as $7.45 million per month. For a company with a market cap of just $10.4 million, the scale of the announced potential revenue — if realized — would represent a dramatic business transformation. The prior session also saw a headline about Datasea expanding into AI elderly care robotics through a cooperation with Linghang Intelligent, building a short-term narrative around the company's AI ambitions.

StockSetups technical picture: Today's candle printed as an inverted hammer — a candlestick pattern where the price opens near the day's low, spikes sharply higher, then closes well off the high. It can signal buying enthusiasm but also distribution if sellers step in near the top. RSI reached 79, approaching overbought. ADX at 34 indicates a strengthening trend, though the MA stack remains mixed. The stock sits 47.2% below its 52-week high, meaning today's move, large as it was, did not recover its prior peak. StockSetups scored DTSS at conviction 42/100, grade D, and a squeeze score of 58/100. With 5.3 days to cover (shorts would need 5.3 days of average volume to fully close their positions — a meaningful squeeze risk), continued volatility is plausible. The free float is a relatively tight 56.9%, which can amplify price swings when big news hits.

BIAF — bioAffinity Technologies, Inc. (+66.2%)

bioAffinity Technologies closed at $8.89, up 66.2% on volume of 12,471,735 shares — roughly in line with its elevated 20-day average of 8,230,639, suggesting this is an actively traded name even on quiet days.

Why it moved: The primary catalyst was the granting of a Hong Kong patent for bioAffinity's CyPath Lung Cancer Diagnostic, confirmed by Benzinga, Advfn, TipRanks, and Quiver Quantitative. The Quiver Quantitative note also flagged that Nasdaq compliance and a VA (Veterans Affairs) deal were adding to trader interest, a dynamic highlighted by StocksToTrade and timothysykes.com as well. Patent grants validate the intellectual-property moat around a diagnostic product and can shift sentiment quickly in small-cap healthcare names.

StockSetups technical picture: BIAF's setup is the cleanest of today's five movers from a technical standpoint. The moving-average stack is fully bullish, ADX reads a strong 56 (high ADX values indicate a well-established trend), and the stock gapped up 30% at the open. The RSI of 58 — unlike the overbought readings in AEMD and DTSS — is not yet in extreme territory, leaving room for the trend to breathe. StockSetups awarded BIAF a conviction score of 88/100 and a top grade of A+, with a technical rank of 98 and RS rating of 99. The trend-template score of 7 (out of 8) means BIAF satisfies nearly all of the Minervini trend-template criteria — a framework that checks whether a stock's price is above key moving averages that are themselves in proper alignment. The squeeze score is just 16/100: with only 43,959 shares short and zero days to cover, this was not a short-squeeze story — it was a genuine news-driven and technically sound breakout. BIAF still sits 41.8% below its 52-week high, so there is prior overhead resistance to contend with.

TURB — Turbo Energy, S.A. (+55.0%)

Turbo Energy closed at $1.39, up 55% on extraordinary volume: 123,520,814 shares traded — nearly 20 times its 20-day average of 6,297,987. That volume surge is the most eye-catching data point in today's entire mover list. The stock gapped up 72.4% at the open but closed well off that implied opening high, suggesting sellers absorbed a portion of the early surge.

Why it moved: No confirmed catalyst is on file for TURB. With no news headlines provided, the catalyst is unclear — this move appears to be technically and momentum-driven, amplified by extremely thin liquidity characteristics. The free float is just 35.5% — meaning only 35.5% of total shares outstanding are freely tradeable by the public. A low float (a small pool of shares available to trade) means that even modest buying demand can push the price dramatically higher, and the reverse is equally true on the downside. TURB sits 87.7% below its 52-week high, indicating the stock was deeply depressed before today's spike. The squeeze score of 48/100 and 2.6 days to cover suggest some short-covering may have contributed to the move, but without a confirmed catalyst, this pattern fits the profile of a low-float momentum flush. TURB also appeared in this morning's premarket movers recap, meaning the gap had already formed before regular trading began.

StockSetups technical picture: The conviction score is 42/100, grade D, and the trend-template score of 3 reflects a stock that does not satisfy the structured trend criteria. RSI of 59 and ADX of just 19 do not indicate a strong or confirmed trend — the massive volume is the dominant signal here, not the chart. When volume runs 20× average with no known news, extra caution is warranted: these moves can evaporate as quickly as they appear.

AIFF — Firefly Neuroscience, Inc. (+38.7%)

Firefly Neuroscience closed at $1.29, up 38.7% on volume of 17,237,375 shares — an enormous 18.6 times its 20-day average of just 924,741. The stock gapped up 10.7% at the open and continued higher through the session.

Why it moved: Firefly Neuroscience announced a collaboration with Radial to integrate its AI-powered EEG/ERP (electroencephalogram/event-related potential) brain-function technology into Radial's AI-native operating system for brain medicine. Per Yahoo Finance and Stock Titan, Radial operates the country's largest brain-medicine clinic network, meaning Firefly's Evoke™ platform would gain access to a significant clinical footprint. Quiver Quantitative confirmed the collaboration and noted the Evoke platform is designed to bring objective brain-function insights to clinical settings. For a micro-cap neuroscience company with a market cap of $20.2 million, a distribution partnership with a major clinical network is a meaningful business development event.

StockSetups technical picture: The volume surge is the dominant signal — 18.6× average volume on a named partnership is genuine interest, not noise. RSI of 63 and ADX of 16 suggest the trend is not yet extended or confirmed — the ADX below 20 typically means the directional move is still early or weak in structure. The MA stack is mixed. StockSetups scored AIFF at conviction 42/100, grade D, with a squeeze score of 61/100. The squeeze score deserves attention: AIFF carries 422,220 shares short and 5.6 days to cover — the highest days-to-cover in today's group. Days to cover (also called the short ratio) measures how many days of average trading volume it would take for all short sellers to buy back their shares; a higher number means shorts are more trapped if the stock keeps rising. The RS rating of just 10 reflects AIFF's weak longer-term relative performance versus the market, a reminder that today's move is a single-day event, not a trend reversal confirmation.

The bottom line

Today's five biggest gainers — AEMD, DTSS, BIAF, TURB, and AIFF — covered a wide range of catalysts: a transformative merger announcement, a scaled AI commercial deployment, a patent grant, a clinical network partnership, and one name with no confirmed catalyst at all. What they share is this: all five are micro-cap or small-cap stocks where a single news event, or even the absence of one, can move the price by double or triple digits in a single session.

That same volatility cuts both ways. Research consistently shows that the biggest single-day gainers — especially those driven by low float, momentum, or squeeze dynamics — frequently give back a significant portion of the move in the days that follow. Chasing an already-extended stock after a 50%, 100%, or 370% run is one of the fastest ways to experience a sharp loss. Even BIAF, today's highest-conviction setup, sits far below its 52-week high and faces overhead supply.

If you're studying these moves, focus on the why — understanding whether a catalyst is fundamental and durable, or short-lived and sentiment-driven, is the most important analytical skill. Tools like the VWAP fade setup and gap-and-go framework can help you think about entries and exits on volatile names like these.

StockSetups scans the full ~12,300-stock US universe after every market close, surfacing the day's biggest movers, detecting confirmed chart patterns and candlestick signals, and ranking long setups across four stages — setting up, breaking out, broke out, and retesting — with conviction scores, squeeze scores, and smart-money signals to help you do your own research efficiently.

This recap is educational only and is not financial advice or a recommendation to buy or sell any security. Always do your own research and manage your risk.