After-Hours Movers Oct 22, 2026: Why TANH, AARD, DKI Jumped

TANH — Tantech Holdings Ltd (+36.2%)

Tantech jumped 36.2% after the bell, trading up to $33.50 versus the 4:00 PM ET regular-session close. About 2.2 million shares changed hands after hours, against a 20-day average of roughly 98,700 (that average covers full days). Market cap is only about $6.9 million, which makes this a micro-cap.

No news, filing or announcement explains the move. The latest headlines were a forum discussion page and a volatility-levels note, and the two most recent filings were routine foreign-issuer 6-Ks. The move looks momentum- or technically-driven.

On the chart, there is no active StockSetups lane signal. RSI is 64, ADX is 19 (a weak trend), and the moving-average stack is mixed. The stock sits 75.3% below its 52-week high, with a relative strength rating of 11 and a conviction score of 44/100 (grade D).

The squeeze score is 77/100. Free float is 94.7%, so this is not a low-float name. Short interest is 802,659 shares, about 1.4 days to cover (how long it would take shorts to buy back at average volume), and short-volume was 62%. Thin after-hours trading can reverse at the next open.

AARD — Aardvark Therapeutics, Inc. (+24.7%)

Aardvark rose 24.7% after hours to $4.94 on about 1.4 million shares, versus a 20-day average near 126,500. Market cap is about $86.7 million.

The most likely catalyst is an FDA decision to lift a clinical hold on the ARD-101 program. Investing.com reported it on October 22 under the headline "Aardvark Therapeutics stock surges as FDA lifts clinical hold." The same article says the company plans a review of the dataset from the terminated trials on October 23 at 8:00 a.m. EST. Aardvark also filed an 8-K on October 22, but its contents could not be confirmed. No deal terms or dollar amounts were found.

Technically the picture is weak. RSI is 38, ADX is 26, the moving-average stack is bearish, and the stock is 75.0% below its 52-week high. Conviction is 0/100 and the trend-template score is 0.

The squeeze score is 39/100, with 3.8 days to cover and 57% short-volume. A short-sale restriction (SSR) is active, which limits shorting on downticks. Biotech news moves can fade or extend sharply at the open.

DKI — DarkIris Inc. (+16.1%)

DarkIris gained 16.1% after hours to $2.59 on about 2.1 million shares, roughly double its 20-day average of about 1.09 million. Market cap is only about $112K, an extreme micro-cap.

No news, filing or announcement explains tonight's move. Earlier this week the company announced a 1-for-50 reverse stock split (a share consolidation that cuts share count and raises the per-share price). Recent filings include several Schedule 13G passive-stake notices and a 424B4 from October 9. None explains the jump, so it looks momentum- or technically-driven.

The chart shows a bullish engulfing candle, but the backdrop is poor: RSI 21, ADX 14, a bearish moving-average stack, and a price 99.7% below its 52-week high. Relative strength is 1 and conviction is 20/100.

The squeeze score is 37/100. Short interest is just 13,653 shares (0.3 days to cover) though short-volume was 74%. The smart-money score is 19/100, with a largest disclosed stake of 11.7%. Reverse-split names are notoriously volatile.

BEZ — BEZ (+12.7%)

BEZ rose 12.7% after hours to $8.18 on about 4.7 million shares, below its 20-day average of about 5.6 million.

BEZ is the Tradr 2X Short BE Daily ETF, which seeks twice the inverse daily performance of Bloom Energy (NYSE: BE), so it moves opposite to Bloom. Bloom fell on October 22 with no company announcement that day. 24/7 Wall St. reported that power stocks that had rallied on the AI data center trade were reversing, with Bloom leading the retreat ahead of its Q3 report. Investing.com said Bloom ended the regular session at $217.77, down 8.7%. Its Q3 results came after the close, so they did not drive that session. No source confirmed a BEZ price for the day, so the size of the after-hours move is unverified.

Technically, RSI is 56 and ADX is 18, and the fund is 97.8% below its 52-week high. Conviction is 0/100 and the squeeze score is 1/100, so squeeze mechanics are not a factor. Leveraged inverse ETFs reset daily and can swing hard, so they carry added risk.

GIXI — Gix Internet Ltd. (+12.2%)

Gix Internet rose 12.2% after hours to $4.40 on about 7.6 million shares, versus a 20-day average near 2.1 million.

The most likely catalyst was news from Gix's minority-held unit Quantum X Labs, disclosed the morning of October 22. Investing.com reported that Quantum X Labs achieved two quantum computing breakthroughs, including an error-correction decoder on NVIDIA's CUDA-Q platform with 12–13% fewer logical errors than the industry-standard benchmark. A separate StocksToTrade article instead pointed to the deliverz.ai unit expanding autonomous robotic logistics at Israel's Sheba Medical Center to include blood and bone marrow delivery. Sources also disagree on the size of the earlier move, and the primary press release was not found, so exact wording and timing are unverified.

The chart shows no lane signal. RSI is 29, ADX is 44 (a strong trend, here a downward one), and the stock is 67.3% below its 52-week high. Conviction is 3/100. Free float is 24.9% and short-volume was 35%. No squeeze score was available.

The bottom line

After-hours moves happen on thin liquidity, with wide spreads and few buyers and sellers. They can extend or fully reverse at the next open. Several of these names are micro-caps, and one is a leveraged inverse ETF. Chasing extended gainers is high-risk, and patterns and squeezes often fail. Size positions carefully, use a stop, and do your own research. Nothing here is financial advice.

StockSetups scans the full US universe after every close and every premarket morning. For recent context, see After-Hours Movers Oct 21, 2026 and Top Stock Movers Oct 22, 2026.