Rowan wants the Cayman arbitrage closed. Bermuda wins if it is.

Marc Rowan, chief executive of Apollo Global Management, which owns Athene, has asked US regulators to shut the Cayman Islands life-reinsurance regime, and who is asking is at least as telling as what he said. Speaking at the Bank of America European Financials CEO conference in London, he said looser Cayman rules amount to “a gaping hole in the US regulatory system,” that the arrangement threatened to erode public trust in the industry, and that recent NAIC pronouncements tell him the gap “is about to be closed.”

Rowan's case is simple enough: reinsurers are drawn to Cayman, he said, because “you don't have to put up the same amount of capital and can take a little more risk,” and a capital regime that stops at the water's edge invites the business to leave. The same facts make the request self-interested in a way worth stating plainly: Athene is the largest seller of annuities in the United States, its reinsurance arm, Athene Life Re, is domiciled in Bermuda, which the US treats as qualified, and capacity booked into a non-reciprocal domicile such as Cayman—not on that list though it is seeking to be—is a cheaper alternative to the capacity Bermuda supplies.

The scale gap explains why the politics run this way: Bermuda's long-term insurance sector holds more than $1.5 trillion of assets, while Cayman's life and annuities sector held about $101 billion at the end of 2025, up from $23 billion in 2020—more than fourfold in five years but still only about a fifteenth of Bermuda's book on the reported totals, though the two figures describe differently labeled sectors. Cayman's story is velocity rather than mass, and velocity is what a capital charge is built to bend.

Both domiciles feed on the same demand—life insurers ceding long-term risk as annuity sales rise with an ageing population, a flow Rowan expects to keep growing until 2050—while the NAIC works toward tighter capital standards for life reinsurers based in jurisdictions deemed not to have regulatory equivalence with the US, with the tighter rules intended to take effect by the end of 2027. As we reported in September, an NAIC memo instructed the Life Risk-Based Capital Working Group to develop a capital charge for cessions outside reciprocal jurisdictions, moving jurisdiction risk out of a checklist and into the formula itself, which converts Bermuda's earned recognition from a credential into a line item competitors cannot match.

It is worth being precise about what a reciprocity charge fixes: AM Best has already flagged that reserve credits in offshore annuity reinsurance are rising faster than the collateral backing them, a statement about funding quality rather than domicile, and a charge that penalizes cessions into non-reciprocal jurisdictions will move where the paper is written without saying whether the reserves behind that paper are properly collateralized. Bermuda's qualification answers the first question and is silent on the second, and the firms that treat the charge as a clean bill of health for the Bermuda model will be reading it for more than it contains.

Rowan raised the version of this the NAIC will find harder, because the arbitrage is not confined to the Caribbean: “a few US states, in order to make their local companies more competitive, have kind of done an onshore Cayman,” he said, and he expects that too to be addressed. Shutting the offshore route is a formula exercise—write the charge, define the jurisdictions that escape it, let the RBC text do the sorting—while reaching the domestic version means acting on states inside the compact whose rules the NAIC coordinates, where the levers likely run through accreditation and model adoption rather than a line in the capital calculation. The offshore trade closes first; the onshore version has a longer runway and more owners.

The calendar is the other half of it: a rule meant to bite at the end of 2027 leaves more than a year in which cession decisions can be made under the old arithmetic, and insurers weighing Cayman capacity have every reason to price the deadline into the treaty rather than wait for it. The falsifiable version is that Cayman's growth steepens into the effective date and stalls after it, with Bermuda platforms picking up share on the other side, and Cayman's pending bid for qualified jurisdiction status becomes the second thing to watch, because a status granted after the formula is set is worth less than one granted before it.

Rowan's other piece of news shows how fluid the domicile question is: Athora, the Athene spin-off, plans to move its corporate and legal headquarters from Bermuda to London by the end of 2027, after acquiring Britain's Pension Insurance Corporation for $7.6 billion in March. The published account of his remarks on the UK preference breaks off mid-sentence, so the reasoning is not available here, but what the sequence establishes is that domicile, for platforms of this kind, is a variable to optimize rather than a fixed address. Onshore capacity has been compounding far more slowly than the offshore alternatives: US life and health admitted assets rose 4% to $10.31 trillion in six months, while Bermuda's sidecar book compounded roughly five times faster, which is the migration a capital charge is meant to interrupt.

That a charge is coming is the consensus read, since the working group has the assignment and the intended effective date is public; calibration is the open question, and calibration decides what follows. A number set merely to deter pushes cessions toward Bermuda and toward the states Rowan called the onshore Cayman, leaving the arbitrage intact in a different domicile; a number set high enough to reprice the trade tests whether the annuity demand he expects through 2050 can be met without it. Either way, the deadline is already a treaty-pricing input: anyone signing Cayman capacity today is underwriting a rule that has not been drafted.