The IPO Window Stays Open, But the Liquidity Beneath It Is Thinning

The first half of 2026 was, by any base-rate comparison, one of the most prolific issuance periods in U.S. capital-markets history. Companies raised roughly $114.1 billion through traditional IPOs in H1 2026 — more than seven times the haul from the same period in 2025^[1]. SpaceX alone accounted for $75 billion of that when it priced 555.6 million shares at $135 on June 11^[2]. Two weeks later, SK hynix raised $26.5 billion on Nasdaq — the largest U.S.-listed share sale by a foreign company in history, eclipsing Alibaba’s 2014 record^[2].

The trajectory is clear: the window is open, issuers are using it, and the deal sizes are getting larger. The question is whether the market plumbing underneath that window is getting sturdier or more fragile. Several indicators suggest the latter.

This Week: Three Consumer and Tech Names Test the Calendar

The IPO calendar for the week of July 27 carries three deals — and they are a useful cross-section of what’s coming to market right now.

Jersey Mike’s (JMKE) — The Blackstone-backed sandwich chain plans to raise $1.0 billion by offering 43.5 million Class A shares at $21 to $25, with Morgan Stanley and Jefferies leading^[3]. At the $23 midpoint, the deal implies a market cap near $7.3 billion^[3]. About 68% of the shares are secondary, sold by existing holders including Blackstone and the Abu Dhabi Investment Authority^[3]. That’s a heavy secondary component — it tells you insiders are taking cash off the table, not just the company raising growth capital.

Reformation (REF) — Permira-backed sustainable womenswear brand targeting a valuation up to $1 billion, offering 14.1 million shares at $15 to $17 via J.P. Morgan and Morgan Stanley^[4]. The company reported $507.1 million in net revenue for 2025^[4]. A DTC apparel IPO at this size is a test of whether investor appetite extends beyond AI and semiconductors into consumer discretionary.

Ionic Digital (IOND) — A bitcoin mining company offering 10.8 million shares at a fixed $53 per share via J.P. Morgan^[5]. The deal size hasn’t been finalized, but the fixed-price structure is notable — most IPOs set a range and discover the final price through the roadshow.

Jersey Mike’s, with roughly 3,000 franchised locations, is the kind of steady-cash-flow business that tends to price well when markets are calm — but 68% secondary is a signal worth watching.

Recent Post-IPO Performance: The Dispersion Is Wide

If you want to know whether the IPO window stays open, watch what happened to the last batch of deals that came through it. The results through late July are bifurcated:

Source: Renaissance Capital priced IPOs table^[6] and stockanalysis.com^[7].

The pattern: large-cap, profitable, or strategically positioned names (SK hynix, Bending Spoons, Doncasters, Csquare) are holding or gaining. Smaller speculative deals (Standard Nuclear, QumulusAI, Pershing Square) are getting hit hard. SpaceX itself is down nearly 15% from its $135 offer price — a remarkable slide for the largest IPO in history, and one that echoes the classic post-IPO pattern where the first-day pop gives way to a drift lower as initial enthusiasm meets supply overhang^[6].

I’d put the probability that the IPO window remains broadly open through Q3 2026 at roughly 65/35. The 65% case: H1 proceeds were seven times last year’s, institutional appetite for large deals is intact, and the pipeline (Anthropic, OpenAI, Shein) is deep. The 35% case: the dispersion we’re seeing in post-IPO returns widens, a couple of high-profile deals price below range or withdraw, and the liquidity-fragmentation signals described below feed into a broader risk-off episode that shuts the window for smaller issuers.

The Global Chip-Listing Wave

The IPO story isn’t only American. On Monday, July 27, CXMT — formerly ChangXin Memory Technologies — begins trading on the Shanghai Stock Exchange after raising 66.6 billion yuan ($9.8 billion), making it the largest onshore Chinese IPO since Agricultural Bank of China in 2010^[8].

The retail portion was 212 times oversubscribed, with individual investors submitting 9.4 million orders for 7.07 trillion yuan worth of shares — roughly ten times the retail order book of SpaceX’s IPO^[8]. CXMT is the world’s fourth-largest DRAM maker and Beijing’s champion for reducing dependence on foreign memory suppliers, particularly in high-bandwidth memory for AI data centers^[8].

The IPO priced at 2.4 times book value — a 56% discount to the average price-to-book ratio of global DRAM peers SK hynix, Micron, and Nanya^[8]. A Hyperliquid perpetual futures contract tied to CXMT’s expected share price was trading at approximately $6.38 late on July 24, implying a valuation near $428 billion — roughly five times the offer-price valuation^[8]. A gain of about 330% on debut would vault CXMT past ICBC’s 2.6 trillion yuan market cap to become the most valuable China-listed company^[8].

CXMT’s listing is also a signal for the pipeline behind it. Yangtze Memory Technologies and Baidu’s chip unit Kunlunxin are in the deal queue, and DeepSeek may file for an IPO as soon as this year^[8]. The memory-chip listing frenzy is global: SK hynix’s $26.5 billion Nasdaq IPO was driven by its dominance in HBM, and CXMT is the onshore mirror of the same AI-infrastructure thesis.

The Pipeline Behind the Pipeline

Beyond this week’s calendar, several large names are advancing toward public markets:

• Shein — China’s CSRC approved the fast-fashion retailer’s Hong Kong IPO on July 10^[9], and the HKEX listing committee gave its nod on July 17^[9]. Shein’s draft prospectus disclosed rising revenues but a sharp drop in net income tied to the removal of the U.S. de minimis duty-free exemption, which increased costs for China-origin shipments to U.S. customers^[9]. A profitable fast-fashion company with a tariff headwind — the market will price both.

• Anthropic — The AI company behind Claude confidentially filed an S-1 on June 1, 2026^[9]. No pricing terms or timeline yet, but Anthropic is reportedly considering mandatory employee stock trading plans post-IPO^[7].

• OpenAI — Adding two independent board members ahead of its own IPO^[7], a governance step that typically precedes a public filing by one to three quarters.

The depth of this pipeline is what supports the 65% probability that the window stays open. If Anthropic prices at a valuation anywhere near the private-market figures that have been reported, it would be one of the largest technology IPOs in history — potentially rivaling SpaceX’s $75 billion in proceeds.

Market Structure: The Plumbing Is Shifting

While the IPO calendar captures attention, two structural developments underneath it deserve more focus than they’re getting.

The SEC has proposed rescinding Reg NMS Rule 611 (the trade-through rule) and Rule 610(e) (locked and crossed quotations). Rule 611, in place since the mid-2000s, prevents trading centers from executing orders at prices inferior to protected quotes displayed elsewhere^[10]. The SEC’s argument is that the rule has created a dense routing-compliance burden that may add more complexity than investor protection^[10]. The proposal is still open for public comment and is not final policy^[10] — but if it passes, it would reduce a layer of mandatory venue interaction and shift more responsibility to competition and execution quality. For tokenized-equity platforms and alternative trading systems, a simpler execution framework could lower the barrier to entry^[10].

Liquidity fragmentation is accelerating. JPMorgan and Goldman Sachs data show institutional trading volumes hit $4.2 trillion weekly in early July, with institutional order counts up 34% year-over-year^[11]. Yet average order book depth contracted 23% since the start of Q2 2026^[11]. The divergence — more trades, thinner books — is a hallmark of a market where algorithmic execution fragments order flow across 17-plus venues while market makers, facing tighter leverage limits under Basel IV, narrow spreads on mega-caps and widen them 12–18 basis points on lower-quartile names^[11].

The Fed flagged this concentration risk in its June 2026 financial stability assessment^[11]. Institutional buying in the Magnificent 7 now represents 28% of total U.S. equity institutional flow volume — the highest concentration since the 2000 tech bubble peak^[11]. Index option flows surged 41% in June while single-stock options volumes contracted 6%^[11], and the VIX term structure has moved into backwardation (30-day IV 18.2%, 60-day 17.8%, 90-day 17.5%)^[11] — a pattern that historically precedes elevated market stress within three to four months.

Put plainly: institutions are trading more, in fewer names, on thinner books, and hedging at the index level rather than the stock level. That’s a market preparing for volatility without yet acting on it.

Big Tech Buybacks: Retreating, Not Disappearing

Barclays reported that buybacks among the largest U.S. technology firms have fallen roughly 17% year-over-year as they redirect capital toward AI infrastructure^[12]. The six largest tech companies — Apple, Microsoft, Nvidia, Alphabet, Amazon, and Meta — represented more than 25% of S&P 500 buybacks in 2024 and 2025^[12]. Hyperscaler capital expenditures are expected to exceed $1 trillion annually by 2028^[12].

The market is rewarding the shift. The S&P 500 Buyback Index has underperformed the broader S&P 500 by roughly 30% since late 2022, when ChatGPT arrived^[12] — evidence that investors are valuing reinvestment into AI-driven growth more than cash returns. Valuations for the largest tech firms have compressed from about 33 times earnings two years ago to below 25 times^[12].

This matters for the IPO market in two ways. First, the largest tech companies are issuing debt, equity, and convertible securities to fund AI buildout rather than returning cash — and that supply competes with new IPO issuance for investor dollars. Second, the buyback retreat removes a structural bid from the equity market. Buybacks from the top six tech firms alone were running at a pace of more than 25% of all S&P 500 repurchases; if that bid fades, the float-absorption dynamic that helped support mega-cap prices weakens.

What to Watch Next

1. JMKE and REF pricing (this week) — If Jersey Mike’s prices within its $21–$25 range and trades well, the consumer-IPO window is confirmed open. If it prices below range or the stock breaks issue price on day one, smaller issuers may delay. Reformation at $15–$17 is the smaller test of the same question for DTC apparel.

2. CXMT’s debut pop (Monday, July 27) — A 330% gain would make CXMT China’s most valuable listed company. A more modest debut (say, 50–100%) would still validate the memory-chip thesis but might temper the pipeline behind it (Yangtze Memory, Kunlunxin). Watch the shadow-market perpetual on Hyperliquid as a real-time gauge.

3. SEC Reg NMS comment period — The trade-through proposal is still open for public comment. Watch for filings from large exchanges, HFT firms, and ATS operators — their positions will signal whether rescission is likely to be finalized and on what timeline.

4. VIX term structure — The current backwardation (short-dated IV above long-dated) has historically preceded 5–8% equity corrections within 8–12 weeks^[11]. If the curve steepens further or the 30-day IV crosses above 20%, that’s the signal that the hedging anxiety is becoming actionable.

5. Shein’s prospectus reception — The HKEX listing committee has approved the IPO. The key question for investors is whether the post-de-minimis cost structure is already fully priced into the offering range, or whether there’s downside risk if tariff policy shifts again.

6. Anthropic’s public S-1 — Anthropic confidentially filed on June 1. A public filing would likely come in Q3 or Q4 2026 and would be the next mega-cap AI IPO after SpaceX. Its pricing terms will set the reference for any OpenAI filing that follows.

The base case is that the IPO window remains open through the end of Q3 2026 — the pipeline is deep, institutional appetite for large deals is intact, and the H1 momentum is real. But the liquidity-fragmentation signals, the VIX backwardation, and the post-IPO dispersion we’re already seeing in names like SpaceX (-14.8%) and Standard Nuclear (-44.7%) are the indicators that could turn the 65% into something closer to a coin flip if any single large institutional rebalance away from mega-caps triggers a broader risk-off cascade.

The market is issuing at a record pace. The plumbing underneath it is thinner than it looks.