Biggest Small-Cap Gaps September 9, 2026: Sourced Float and Dilution

Direct answer: On September 9, 2026, three small-caps surged 68% to 114% intraday. YMAT gained 114% (float 4.01M, volume 16M), AGRZ 94% (float 21.67M, volume 102M), OLB 68% (float 24.02M, volume 107M). These moves illustrate the structural mechanics of a tight market: when volume exceeds four times the float, each transaction pushes price further from equilibrium. No fundamental catalyst publicly identified. Figures sourced from SEC and dated market flow; not a recommendation.

The Three Largest Moves on September 9, 2026

The September 9 session saw three U.S. small-caps post intraday gains exceeding 68%. Opening gaps ranged from 42% to 89%. Here's what the market data and SEC filings show.

YMAT (J-Star Holding Co., Ltd.) recorded a maximum intraday gain of +114%, with an opening gap of +42% from the prior close. The float stands at 4.01 million shares (source: most recent 10-Q available as of September 9, 2026). Closing price: $2.28. Total volume traded: 16,059,608 shares, roughly four times the float in a single session. On a small-cap that gaps hard with a float this tight, sustained buy-side order flow alone can project price far above the open.

AGRZ (Agroz Inc.) posted an intraday gain of +94% and an opening gap of +89%. Float: 21.67 million shares. Closing price: $0.2555. Session volume: 101,997,951 shares, approximately 4.7 times the float. This massive turnover of the outstanding float signals very active liquidity, but also high structural volatility. No material press release that day.

OLB (The OLB Group, Inc.) closed +68% intraday, with an opening gap of +44%. Float: 24.02 million shares. Price: $0.331. Volume: 107,095,232 shares, roughly 4.5 times the float. Again, volume far exceeded the available share inventory, creating mechanical upward pressure as supply thinned.

No specific catalyst—earnings announcement, merger, major contract—was publicly identified for these three names as of publication date. These moves may stem from technical factors: short covering, concentrated speculative buying, algorithmic orders. No obvious fundamental event.

Float: A Dated Figure That Changes With Every Dilution

The float is the number of a company's shares available for public trading. Excluded: shares held by executives, founders, institutional investors subject to lock-ups, and treasury stock.

You calculate float by subtracting from total outstanding shares the insider holdings disclosed in Form 3, 4, and 5 filings (Section 16), significant positions (≥5%) disclosed in Schedule 13D and 13G, shares subject to lock-up (commonly 90 to 180 days post-IPO for traditional IPOs, up to 12 months for certain SPACs), and shares held in unvested employee stock plans.

Float is not static. Every dilution event changes the numerator. Share issuances (follow-on offerings, PIPE private placements) add outstanding shares and typically increase the float. Warrant, convertible bond, or preferred share conversions increase common shares outstanding. Employee option exercises (ESOP) increase the float if the shares are immediately resalable. Lock-up expirations transform insider-held shares into freely tradable shares. Buybacks, conversely, reduce the float.

To verify a small-cap's float, 10-K (annual report) and 10-Q (quarterly report) filings detail outstanding shares, warrants outstanding, convertibles, and sometimes restricted stock in the "Capital Stock" or "Stockholders' Equity" section. Schedule 13D/G filings by holders of more than 5% of equity identify non-floating blocks. S-1 and 424B prospectuses for IPOs or follow-ons specify the number of shares sold, lock-ups, and registration rights. Form 4 filings (insider transactions) track executive sales and purchases, which impact float if shares move out of restricted status.

Float figures published by FloatVerify are systematically sourced from these SEC filings, dated, and updated with each material filing. A float dated June 30, 2026, may be obsolete by July 15 if dilution occurs in between.

Volume and Float Turnover: The Mechanics of Volatility

A small-cap's volatility depends partly on the volume-to-float ratio. When volume traded in a session exceeds available float, it means on average each share of the float changed hands at least once. The higher this ratio, the more unmet buy or sell pressure must express itself at prices distant from the prior equilibrium.

For YMAT (float 4.01M, volume 16.06M), the volume-to-float ratio hits ~4.0. In other words, the equivalent of four times the float traded in one session. This massive turnover indicates either very active speculation, short covering (short squeeze), or both.

For AGRZ (float 21.67M, volume 102M), the ratio is ~4.7. Despite a wider float, absolute volume is six times that of YMAT, creating sustained buy pressure throughout the session.

For OLB (float 24.02M, volume 107M), the ratio is ~4.5. Volume far exceeds the available share inventory, forcing buyers to bid up to find sellers.

This mechanism is purely structural. It says nothing about the company's fundamental quality, but explains why moderate order flow (in dollars) can produce spectacular price gains (in percentage terms) when float is tight. Conversely, moderate selling pressure can trigger equally rapid collapse if the float is saturated and buyers withdraw.

The SSR List and Short Sale Regulation

Stocks that fall 10% or more from the prior close are automatically placed on the SSR (Short Sale Restriction) list, pursuant to the SEC's Regulation SHO (Rule 201, adopted in 2010). This restriction remains active through the close of the following trading day.

During the SSR period, any short sale can only execute at a price above the current best bid (uptick rule). The goal is to limit cascading selling pressure during rapid declines.

In the case of rapid rallies like those observed on September 9, 2026, SSR does not directly apply on the day of the rally (since there's no 10% drop). However, if any of these names fell 10% or more in a subsequent session, it would be placed on the SSR list, making it costlier or impossible for short sellers to add new bearish positions.

The SSR list is published daily by NASDAQ (ftp://ftp.nasdaqtrader.com/symboldirectory/) and the NYSE (https://www.nyse.com/regulation/threshold-securities). Traders and algorithms consult this list in real time to adjust execution strategies.

Dilution and Float Evolution: A Constant Risk for Small-Caps

U.S. small-caps, especially those listed on NASDAQ Capital Market or NYSE American (formerly AMEX), frequently resort to dilution to fund operations. Unlike large-caps that can borrow at low rates or generate operating cash flow, small pre-profitable or high-cash-burn companies depend on repeated share issuances.

Private placements (PIPE: Private Investment in Public Equity) are often sold at a 10-20% discount to market price and come with coverage warrants. At-the-market offerings (ATM) allow shares to be issued over time without a one-time block. Many small-caps borrow via convertible notes to specialized hedge funds, which convert debt to equity at a discount, then immediately sell, creating continuous downward pressure. Warrant or option exercise instantly dilutes the float, often without prior public announcement—the information appears in the next 10-Q.

Each dilution increases the denominator of earnings per share (EPS), reduces existing shareholders' ownership percentage, and increases the float, which may reduce per-unit volatility (a wider float requires more volume to produce the same percentage price move) but mechanically dilutes value per share.

To track dilution in real time, Form 8-K filings (material events), section "Sales of Equity Securities" or "Material Definitive Agreements," describe ongoing issuances. 424B prospectuses are filed immediately after an offering. Form S-3 (shelf registrations) authorize a company to issue up to a specified dollar amount of shares over three years without going through a full registration process each time.

A float measured at a given date can therefore be obsolete days later if dilution intervenes. That's why FloatVerify displays a timestamp for each float metric and flags "source splits" (divergences between data providers) instead of presenting a single falsely certain figure.

Recap

Point	Takeaway
YMAT	+114% intraday, +42% gap, float 4.01M, volume 16M (ratio 4.0)
AGRZ	+94% intraday, +89% gap, float 21.67M, volume 102M (ratio 4.7)
OLB	+68% intraday, +44% gap, float 24.02M, volume 107M (ratio 4.5)
Float	Number of shares available for public trading, calculated from SEC 10-K/10-Q and Schedule 13D/G filings, changes with every dilution
Volume/float	When volume exceeds float, each share changes hands multiple times, creating mechanical volatility
Dilution	Increases float and reduces per-share value; tracked via Form 8-K, S-3, 424B
SSR	Stocks down 10%+ placed on Short Sale Restriction list (short sales limited to above bid)

FAQ

What were the biggest small-cap gaps on September 9, 2026?

The three largest intraday moves measured that day were YMAT (+114% intraday, +42% gap), AGRZ (+94% intraday, +89% gap), and OLB (+68% intraday, +44% gap). These moves came with volumes of 16 to 107 million shares against floats of 4 to 24 million shares, meaning significant float turnover.

What is a stock's float and where can you verify it?

The float is the number of shares available for public trading, excluding shares held by insiders, strategic investors, and lock-ups. You calculate it from SEC filings (10-K, 10-Q, S-1, 424B) detailing capital structure, then subtract positions disclosed in Schedule 13D/G. The float changes with every dilution, conversion, or lock-up expiration.

Why does a low float amplify price moves?

A restricted float means a given buy or sell volume represents a large proportion of total tradable shares. When volume exceeds available float, each successive transaction must find a counterparty at a price increasingly distant from the last, creating mechanical volatility. This is a market microstructure phenomenon, not a signal of fundamental quality.

How do you identify stocks on the SSR (Short Sale Restriction) list?

The SSR list is published daily by each exchange (NASDAQ, NYSE) and includes stocks that dropped 10% or more from the previous close. During the SSR period, short sales can only execute above the current best bid (uptick rule). The list is accessible via exchange websites and certain real-time data providers.

Is a stock's float a fixed number?

No, float changes constantly. Every dilution event (share issuance, warrant or convertible conversion, employee option exercise) increases shares outstanding. Lock-up expirations (post-IPO restriction periods) and insider sales increase the float. Conversely, buybacks reduce it. A float measured today can be obsolete tomorrow.

Sources

• SEC EDGAR (https://www.sec.gov/edgar): Forms 10-K, 10-Q, 8-K, S-1, 424B, Schedule 13D/G, Forms 3/4/5 (Section 16)
• Regulation SHO (SEC Rule 201): short sale regulation and SSR list
• NASDAQ Trader (ftp://ftp.nasdaqtrader.com/symboldirectory/): daily SSR list
• NYSE Regulation (https://www.nyse.com/regulation/threshold-securities): stocks under SSR restriction and Regulation SHO threshold securities
• SEC Forms: 10-K (annual report), 10-Q (quarterly report), 8-K (material events), S-3 (shelf registration), 424B (definitive prospectus)

See the float, sourced and dated, on FloatVerify.

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FloatVerify shows the float, dilution and cash burn of US small-caps, every number sourced and dated — and surfaces divergences between sources ("source split") instead of one falsely certain figure.

Disclaimer: FloatVerify is a data tool, not an investment advisory service. Nothing here is a recommendation to buy or sell. Data, not advice.