After-Hours Movers Nov 9, 2026: Why TANH, RUBI, AMIX Jumped

TANH — Tantech Holdings Ltd (+55.5%)

Tantech jumped 55.5% after the bell, trading up to $30.16 versus the 4:00 PM ET regular-session close. About 1.05 million shares changed hands after hours, roughly five times the stock's 20-day average daily volume of 209,068. That is heavy for an extended session. The company is a roughly $6.9M market-cap industrial name, which is tiny.

Why did it move? No news, filing or announcement explains the move. Recent headlines are generic price-forecast and "risk channels" pieces from Stock Traders Daily, StockInvest.us and Traders Union. None is a company catalyst. The jump looks momentum- or technically-driven.

The technical picture is weak despite the pop. The stock has no active setup lane, RSI is 58, ADX is 27 and the moving-average stack is mixed. It sits 73.1% below its 52-week high. Its relative strength rating is 9, and conviction is 4/100 (grade D). Free float is 94.7%, so this isn't a classic low-float squeeze. Short-volume was 50%.

After-hours moves happen on thin liquidity and can extend or reverse at the next open.

RUBI — Rubico Inc. (+32.4%)

Rubico rose 32.4% after the bell to $2.41 on 496,867 shares, above its 20-day average of 374,855. Market cap is about $5.9M.

No news, filing or announcement explains the move. The most recent filings are resale prospectuses (424B3) and foreign-issuer 6-Ks from late October. There was also a 424B5 on Oct 19 tied to a follow-on offering, which is typically a bearish signal because it can add shares. A Simply Wall St stock-analysis page is the only recent headline.

Technically, a bullish belt hold candle is the one constructive sign. A belt hold is a candle that opens at its low and closes strongly higher. Against that, RSI is 16, ADX is 8 and the moving-average stack is bearish. The stock sits 100.0% below its 52-wk high per our scan, with a relative strength rating of 1 and conviction of 36/100 (grade D). Free float is 98.1% and short-volume was 29%.

This looks like a bounce in a deeply oversold, heavily diluted name, and bounces like this often fade.

AMIX — Autonomix Medical, Inc. (+26.2%)

Autonomix Medical jumped 26.2% after hours to $2.12 on 189,794 shares, over three times its 20-day average of 57,415. Market cap is only about $1.6M.

No news or announcement explains the move. The only recent filing is a Nov 3 8-K about management matters, which was neutral. The move looks momentum-driven.

The scan shows a morning star candle, a three-candle reversal pattern that can mark a bottom. RSI is 25 and ADX is 33, but the moving-average stack is bearish and the stock is 94.6% below its 52-week high. Relative strength is 3, and conviction is 36/100 (grade D). Free float is 89.9%, with short-volume at 55%.

A heavily short-sold micro-cap can spike quickly and give it back just as fast, especially on thin after-hours trading.

IAM — Iambic Therapeutics, Inc. (+25.2%)

Iambic Therapeutics rose 25.2% after the bell to $16.78 on 893,407 shares, close to its 20-day average of 840,769. Iambic is a recent IPO (the 424B4 was filed Oct 15).

Several items from Nov 9 could explain the interest. Proactiveinvestors reported Bank of America backing with a 194% upside forecast. Stock Titan reported that Qatar Investment Authority disclosed more than 5% ownership. Iambic will also take part in the Jefferies Global Healthcare Conference, and its CEO will join an AI-in-medicine panel. These are the likeliest drivers, but none is a confirmed single cause.

Free float is just 5.2%. A low float means few shares trade freely, so demand can move the price sharply. The smart-money score is 30/100, with one insider buy of $11.5M: Evan Lockwood Rachlin bought 718,750 shares on Oct 16. Technically there's no active setup. RSI is 40, and the stock is 46.4% below its 52-week high. Conviction is 0/100 (grade D). Short-volume was 54%.

WFF — WF Holding Ltd (+22.9%)

WF Holding gained 22.9% after hours to $1.34 on 5,402,622 shares, in line with its 20-day average of 5,416,392. Market cap is about $9.9M.

No news or announcement explains the move. Recent filings include a 424B5 follow-on offering on Oct 28 (bearish, since it can add shares) and several foreign-issuer 6-Ks. A Schedule 13G passive stake was filed Oct 21, and the largest disclosed stake is 9.9%. The smart-money score is 18/100.

Technically, RSI is 44 and ADX is 70, but the moving-average stack is bearish. The stock is 99.9% below its 52-week high, with a relative strength rating of 2 and conviction of 49/100 (grade D). Free float is 31.7% and short-volume was 39%.

Without a catalyst, treat this as a speculative momentum move that may reverse at the open.

The bottom line

Every name here moved on thin after-hours liquidity, and most are micro-caps with weak trends, recent share offerings or no clear catalyst. Moves like these can extend or reverse at the next open, and chasing extended gainers is high-risk. Patterns and squeezes fail often. Manage risk, size positions carefully and do your own research. This is educational, not financial advice.

StockSetups scans the full US universe after every close and every premarket morning. For more context, see the Nov 9 regular-session recap and the Nov 6 after-hours recap.