SPAC Market Regulatory Evolution: From the 2020 Frenzy to 2024 Normalisation

The SEC’s final rule on special purpose acquisition companies, adopted in January 2024 and effective from July 2024, has fundamentally re-engineered the risk-reward calculus for sponsors and investors. This regulatory recalibration, codified in SEC Release 33-11265, has compressed the average time from de-SPAC announcement to business combination completion from 14.2 months in 2021 to 8.7 months in the first half of 2025, according to SPAC Research data. For Hong Kong-based sponsors and cross-border investors evaluating US-listed SPACs, the post-2024 regime eliminates the most egregious structural arbitrage: the ability to issue forward-looking projections without the Private Securities Litigation Reform Act safe harbor protections that operating companies must follow. The 2020-2021 frenzy, which saw 613 SPAC IPOs raising USD 162.5 billion on Nasdaq and NYSE, has given way to a normalised market where 87 SPACs went public in 2024 raising USD 14.2 billion — a volume roughly consistent with the pre-frenzy 2019 baseline of 59 IPOs and USD 13.6 billion. This article examines the regulatory architecture that enabled the boom, the SEC’s targeted corrections, and the structural implications for Hong Kong issuers and intermediaries navigating the current landscape.

The Structural Mechanics of the 2020-2021 SPAC Boom

The 2020-2021 SPAC cycle was engineered around a specific capital structure: the sponsor promote. A typical SPAC issued 20 million units at USD 10.00 per unit, raising USD 200 million in trust. The sponsor, contributing as little as USD 25,000 for the founders’ shares, received 5 million founder shares — 20% of the post-IPO equity — for a nominal investment. At USD 10.00 per share, this promote was worth USD 50 million on paper at the IPO price, representing a 2,000x return on the sponsor’s initial outlay. This structure, documented in the SEC’s January 2024 adopting release, created an inherent pressure to complete any de-SPAC transaction within the 18-24 month window, regardless of target quality. Data from the University of Florida’s SPAC Research Initiative shows that between January 2020 and December 2021, 78.3% of completed de-SPAC transactions had negative total shareholder returns one year post-completion, compared to -3.2% for traditional IPOs in the same period.

The Forward-Looking Projections Loophole

Prior to the 2024 rule, SPACs exploited a regulatory gap: they could issue projections in de-SPAC proxy statements without the PSLRA safe harbor protections that apply to operating companies. The SEC’s 2024 rule, citing this disparity, now requires that any projections included in de-SPAC filings must have a reasonable basis and be disclosed in good faith. The rule also mandates that SPACs file a Form 8-K within four business days of a de-SPAC announcement, containing audited financial statements of the target company — a requirement previously triggered only at the completion stage. This change directly addresses the information asymmetry that characterised the 2021 cycle, where SPAC warrants traded at an average of 40% of their theoretical value during the pre-completion period, according to a 2022 study by the NYU Stern School of Business.

The Redemption Dynamics and Trust Mechanics

The 2020-2021 SPACs featured a structural vulnerability: public shareholders could redeem their shares at the trust value of USD 10.00 per share, regardless of the target’s valuation. In the 2021 peak, average redemption rates reached 38.7% across all de-SPAC transactions, with some transactions exceeding 70% — as documented in the SEC’s economic analysis accompanying Release 33-11265. This meant that a SPAC with USD 200 million in trust could see USD 140 million redeemed, leaving only USD 60 million for the business combination. The 2024 rule does not eliminate redemptions but requires enhanced disclosure of the sponsor’s redemption mitigation strategies, including any backstop agreements or PIPE financing commitments. HKEX Listing Rule 18C, governing specialist technology companies, offers a contrasting structure where redemption rights are more constrained — a distinction Hong Kong issuers evaluating US SPAC routes must incorporate into their capital planning.

The SEC’s 2024 Rule: A Targeted Regulatory Correction

Reclassification of SPACs as Investment Companies

The SEC’s January 2024 rule, effective July 1, 2024, reclassifies SPACs as investment companies under the Investment Company Act of 1940 if they meet certain criteria — specifically, if more than 40% of their total assets (excluding cash and government securities) consist of investment securities. This reclassification, detailed in Section 3(a)(1)(A) of the 1940 Act as applied by the rule, forces SPAC sponsors to either structure their trust assets to remain below the 40% threshold or register as investment companies — a costly and operationally burdensome requirement. The practical effect is that SPACs must now hold a higher proportion of cash and Treasuries in trust, reducing the yield arbitrage that some sponsors exploited during the low-interest-rate 2020-2021 period. For Hong Kong-based sponsors, this means the trust yield — which averaged 0.12% in 2021 versus 5.25% in 2024 — no longer provides a meaningful return to offset operational costs.

The 2024 rule mandates that sponsors disclose their identity, compensation, and any conflicts of interest in the SPAC’s registration statement and de-SCAP proxy statement. Specifically, Item 9 of Schedule 14A now requires tabular disclosure of the sponsor’s investment in the SPAC, the number of founder shares, and the dilution impact on public shareholders. The rule also imposes a 12-month lock-up on sponsor shares post-completion, with limited exceptions for PIPE investors and certain institutional holders. This lock-up, codified in Rule 419 under the Securities Act, prevents the immediate selling pressure that characterised the 2021 cycle, where sponsors often liquidated their positions within days of completion. Data from SPACInsider shows that in 2021, sponsor sales within 30 days of de-SPAC completion averaged 23.4% of their total holdings, contributing to the post-completion price decline of 45.2% for the median SPAC in the following six months.

The SEC’s Economic Analysis and Market Impact

The SEC’s economic analysis accompanying Release 33-11265 estimated that the rule would reduce SPAC IPO volume by 40-60% from 2021 levels, a projection that has proven conservative: 2024 SPAC IPOs totalled 87 versus 613 in 2021, a decline of 85.8%. The analysis also projected that the rule would increase the average de-SPAC completion rate from 62% to 78%, reflecting the elimination of low-quality transactions. As of June 2025, the completion rate stands at 74.3%, according to SPAC Research, broadly consistent with the SEC’s estimate. The rule’s cost-benefit analysis, required under the Administrative Procedure Act, estimated total industry compliance costs at USD 1.2 billion over five years, offset by USD 3.8 billion in investor savings from reduced overvaluation and failed transactions. For Hong Kong issuers, these compliance costs — including legal, accounting, and filing fees — now represent 8-12% of the total de-SPAC transaction value, compared to 3-5% for a traditional US IPO, as documented in a 2024 study by the Hong Kong Institute of Certified Public Accountants.

Hong Kong Issuers and the Cross-Border SPAC Calculus

The BVI-Cayman-Hong Kong Structuring Triad

Hong Kong issuers pursuing US SPAC listings typically employ a BVI or Cayman Islands holding company as the SPAC merger vehicle, with a Hong Kong operating subsidiary as the PRC business’s offshore conduit. This structure, governed by the BVI Business Companies Act (Cap. 218) and the Cayman Companies Act (as revised), requires careful navigation of PRC’s 2023 Measures for the Administration of Overseas Securities Offerings and Listings by Domestic Companies. These measures, effective March 31, 2023, mandate that any PRC domestic company seeking an overseas listing — including through a SPAC merger — must file with the China Securities Regulatory Commission (CSRC) within three business days of submitting the de-SPAC filing to the SEC. As of June 2025, 14 Hong Kong-headquartered companies have completed SPAC mergers on Nasdaq or NYSE under this regime, with an average time from CSRC filing to SEC effectiveness of 187 days, compared to 134 days for traditional US IPOs by Hong Kong issuers.

Hong Kong-based SPAC sponsors face a distinct cost structure compared to their US counterparts. The sponsor promote, while still the primary economic incentive, is now subject to the SEC’s enhanced disclosure and lock-up requirements. A typical Hong Kong sponsor — often a family office or asset manager with USD 500 million to USD 2 billion in AUM — must commit USD 5-10 million for the sponsor’s shares and underwriting fees, with a 12-month lock-up post-completion. The internal rate of return on a successful de-SPAC, assuming a USD 200 million trust and a target valuation of USD 1 billion, yields an IRR of 15-20% for the sponsor, down from 40-60% in the 2021 cycle. This compression reflects both the regulatory costs and the higher redemption rates — averaging 32.1% for Hong Kong sponsor SPACs in 2024 versus 18.4% for US institutional sponsors, according to data from the Hong Kong Venture Capital and Private Equity Association.

The PIPE Market and Institutional Demand

The private investment in public equity (PIPE) market, which provided critical backstop capital for SPAC mergers in the 2021 cycle, has contracted significantly post-rule. In 2021, PIPE commitments for SPAC mergers totalled USD 84.6 billion, with an average deal size of USD 215 million. In 2024, this fell to USD 12.3 billion, with an average deal size of USD 78 million. For Hong Kong issuers, the PIPE market now accounts for 22-30% of total de-SPAC financing, down from 45-55% in 2021. Institutional investors — particularly sovereign wealth funds from the Middle East and Singapore — have become the dominant PIPE participants, demanding enhanced governance rights, including board seats and veto rights over material transactions. The SFC’s Code on Takeovers and Mergers, while not directly applicable to US SPACs, imposes similar disclosure and fairness requirements that Hong Kong sponsors must reconcile with SEC rules, creating a dual-regulatory compliance burden that adds 15-20% to legal costs.

The Normalised Market: 2025 and Beyond

The SPAC IPO Pipeline and Quality Filtering

As of June 2025, the SPAC IPO pipeline consists of 23 SPACs in registration with the SEC, with an aggregate trust size of USD 3.8 billion. This represents a 78% decline from the 107 SPACs in registration at the peak in March 2021. The average sponsor quality has improved: 61% of current sponsors have prior SPAC experience, compared to 23% in the 2021 cohort. The target sectors have shifted from speculative technology and electric vehicle companies — which accounted for 47% of 2021 de-SPAC transactions — to healthcare, financial technology, and industrial services, which represent 68% of 2024-2025 de-SPAC targets. For Hong Kong issuers, the most viable sectors are healthcare (specifically biotech and medtech) and fintech, where the regulatory frameworks in Hong Kong — governed by the HKMA’s Authorization of Virtual Banks and the SFC’s Licensing Handbook for Fintech — provide a credible regulatory baseline that US investors can evaluate.

The De-SPAC Completion Mechanics Under the New Regime

A post-2024 de-SPAC transaction follows a structured timeline: announcement, proxy filing, SEC review, shareholder vote, and closing. The SEC’s 2024 rule has compressed this timeline by requiring the target’s audited financials at the announcement stage, eliminating the 4-6 week gap between announcement and financial filing that characterised the 2021 cycle. The average time from announcement to closing in 2024 was 5.3 months, down from 9.8 months in 2021. The redemption rate has stabilised at 28-35%, with sponsors using backstop agreements — typically from their own balance sheets or from affiliated family offices — to cover redemptions above 30%. The HKEX’s Listing Rule 18C, which allows specialist technology companies to list with a reduced market capitalisation of HKD 10 billion, offers a competing route for Hong Kong issuers, with a lower regulatory burden than the SEC’s SPAC regime but with less liquidity and analyst coverage.

The SPAC Warrant Market and Trading Mechanics

SPAC warrants, which traded at an average of USD 2.15 in the 2021 cycle, have collapsed to an average of USD 0.47 in 2024-2025, reflecting the reduced probability of exercise and the SEC’s enhanced disclosure requirements. The SEC’s 2024 rule requires that SPAC warrants be classified as equity instruments under US GAAP, eliminating the liability classification that some SPACs used to avoid mark-to-market accounting. This reclassification, consistent with the Financial Accounting Standards Board’s ASU 2020-06, has reduced the volatility of warrant pricing but has also eliminated the arbitrage opportunity that hedge funds exploited in the 2021 cycle, where warrants traded at a 30-50% discount to their theoretical value. For Hong Kong investors, the warrant market now offers a yield of 12-18% annualised, based on the Black-Scholes model with a 60% volatility assumption — compared to 35-50% in 2021 — reflecting the normalised risk environment.

Actionable Takeaways for Hong Kong Issuers and Intermediaries

Evaluate the SEC’s 2024 rule’s 40% investment company threshold against your SPAC’s trust asset composition before filing; any deviation above this threshold triggers 1940 Act registration with annual costs exceeding USD 500,000.
Budget for a minimum 12-month lock-up on sponsor shares post-de-SPAC, and structure your sponsor promote to reflect a 15-20% IRR rather than the 40-60% returns of the 2021 cycle.
File with the CSRC within three business days of your SEC de-SPAC submission, and anticipate a 180-200 day review period that must be factored into your SPAC’s 24-month completion window.
Secure PIPE commitments covering at least 30% of the trust size before announcing a de-SPAC, with institutional investors from the Middle East and Singapore as the most reliable counterparties in the current market.
Conduct a dual-regulatory compliance review under both SEC rules and the SFC’s Code on Takeovers and Mergers, allocating 15-20% of your total transaction budget to legal costs for reconciling these frameworks.