Trust-Value SPAC Arbitrage
Buy pre-deal SPACs below trust value while retaining free equity upside
- Difficulty
- Moderate
- Time to result
- ~months to results
- Steps
- 5
- Confidence
- 98%
A pre-merger SPAC places its IPO proceeds in a trust invested in U.S. Treasury bills while its sponsor searches for an acquisition. Investors can normally redeem shares for their portion of that trust, including accrued yield, when the deal reaches a vote or the vehicle expires. The strategy buys shares below estimated trust value, creating a convergence return as the redemption date approaches. If the sponsor announces a transaction that excites the market, the same shares can appreciate beyond trust value, providing equity-like upside without requiring the investor to accept the merger. The position is not riskless: sentiment, forced selling, documentation, extensions, and operational mistakes can create mark-to-market or redemption risk. The core discipline is to treat the redemption right as the base case and the acquisition upside as an option.
Origin
Extracted from Masters in Business, where Boaz Weinstein explained Saba Capital's pre-merger SPAC strategy.
Core principles
- 01Separate a SPAC's pre-merger trust phase from its post-merger operating-company risk.
- 02Treat redemption value as the anchor for expected return.
- 03Buy below trust value to combine contractual convergence with T-bill yield.
- 04Retain deal upside only when it does not compromise redemption discipline.
- 05Expect mark-to-market volatility even when ultimate redemption value is protected.
How to run it
- 1
Verify the trust
Read the filings to confirm how IPO proceeds are held, which securities the trust may own, and how trust value accrues.
Pro tip Reconcile reported trust assets with shares subject to redemption.
Watch out Do not infer protection merely from the SPAC label.
- 2
Calculate the convergence return
Estimate redemption value, accrued T-bill yield, purchase price, and expected holding period. Annualize the return without assuming a successful merger.
Pro tip Compare the result with Treasury bills and other short-duration event trades.
Watch out Extensions can lengthen the holding period and reduce the annualized return.
- 3
Screen the sponsor and terms
Review sponsor quality, deadlines, warrants, extension votes, and redemption mechanics. Favor clean structures and manageable timelines.
Pro tip Use sponsor quality as an upside filter, not as a substitute for trust protection.
Watch out Complex terms can create administrative or dilution risks.
- 4
Manage temporary price pain
Size the position so forced selling or negative SPAC sentiment cannot compel an early exit below trust value.
Pro tip Match position size to the maximum period until a contractual liquidity event.
Watch out A protected terminal value does not prevent interim losses on the statement.
- 5
Choose upside or redemption
When a deal is announced, value the target independently. Sell into enthusiasm, retain exposure only when justified, or exercise the redemption right.
Pro tip Treat the merger vote and redemption election as separate decisions.
Watch out Failing to redeem can transform a trust-backed trade into speculative equity exposure.
In the wild
A SPAC share trades below its estimated $10 trust value with ten months remaining. The investor confirms the redemption terms, buys the share, and plans to redeem if no attractive transaction emerges. Treasury interest accumulates in the trust while the investor retains the possibility that a popular acquisition sends the share above $10.
→ The base case earns discount convergence plus trust yield, with deal excitement providing optional upside.
Common mistakes
Confusing pre-deal and post-deal risk
The Treasury-backed redemption claim can disappear once an investor accepts the merger and owns the operating company.
Missing the redemption process
Contractual value is useful only if the investor follows the broker and filing deadlines required to claim it.
Ignoring mark-to-market volatility
Forced sellers can push SPACs farther below trust value before redemption, creating losses for leveraged or impatient holders.
Is it for you?
Best for
Event-driven investors who can monitor filings, redemption procedures, deadlines, and temporary price volatility.
Not ideal for
Investors who may miss redemption deadlines or mistakenly hold an unattractive company after the merger.
From the transcript
“what's important to understand with spacts is the life cycle that they start by being extraordinarily safe.”
“from time zero to the day that they are converting into the company that they're taking public, you have the risk of T bills”
“you always have the ability to get your money back.”
From the episode
Boaz Weinstein on Credit Investments