Market

Bermuda reinsurance: Class 4 paper, ILS, collars, and the 1 June wind year

Hamilton is a capital and ILS market: Class 4 balance sheets, collars around cat layers, sidecars, and a 1 June Florida wind year that is not London's 1 January. Reinsured.AI extracts and traces the files those desks post. This page does not invent a Bermuda licence or a cat-bond coupon.

Bermuda's product is capital that can take peak US and global catastrophe, plus the vehicles that transform that risk into notes, sidecars, and collared layers. The Bermuda Monetary Authority licenses commercial insurers and reinsurers, including Class 4 writers that hold large, relatively unconstrained balance sheets, and other classes for more limited or special-purpose vehicles. This page uses those labels as market flavour. It does not claim a BMA licence for Reinsured.AI, and it does not put us on Front Street as a carrier.

The placing custom is different from Lloyd's. Hamilton desks often write treaty and retrocession on company paper, with US and international brokers bringing programmes that were already structured in New York or London. Facultative exists, but the distinctive pile is cat XoL, industry loss warranties, retro, and ILS. A Bermuda underwriter who asks for the collar language, the reset, and the exhaustion is not being precious. Those clauses are how the layer pays. Treaty reinsurance is the ops hub for attachment, reinstatement, and hours. This page is what those clauses look like when the buyer is a Class 4 sheet or a sidecar.

Rated paper and collateralized capacity are not interchangeable files. A traditional Class 4 recovery is a reinsurance recoverable. A cat bond or a fully collateralized ILS recovery is a trigger, a calculation agent, and a trustee report. Mixing them in one "Bermuda CAT" spreadsheet because both mention Florida is how you double-count or miss a basis-risk argument. The ILS Agent is the named worker for offering documents, term sheets, and trigger language as documents with spans — not as a coupon invented in chat.

1 June and the wind year

London's main treaty season is 1 January. Bermuda's distinctive season is 1 June, timed to US hurricane. Florida, Gulf, and national property programmes that failed to close at 1/1, or that were always a 6/1, land in Hamilton in the spring. Monte Carlo is still a September conversation about the next 1/1. It is not the 6/1 close. See events for what those meetings are for. Do not treat a Rendez-Vous badge as a signed 6/1 wording.

The ops failure is a shared inbox. A 1/1 quota share endorsement for ACME Construction Ltd's casualty book and a 6/1 property cat XoL for the same group are two years of account, two event definitions, and two bordereaux calendars. Posting June wind recoveries to the January treaty because the cedent name matched is a claims fight, not a rounding difference.

Renewal comparison at 6/1 is an ops job: last year's cited attachment versus this year's, last year's hours versus this year's, last year's collar versus this year's. A model run that says "ROL up" without those spans is a pricing essay. The reinsurance AI hub is the argument for spans. This page only insists that 6/1 files are not 1/1 files with a tropical adjective.

Collars, sidecars, and ILS documents

A collar on a Bermuda layer is not a vibe. It is a formula: a band around recovery, a profit corridor, or a spread that changes cession as losses develop. If the wording cites a collar and the pricing memo paraphrases it, the wording wins. If the sidecar term sheet cites a different band than the reinsurance agreement, you have a conflict. Show both pages. Do not pick the memo because it is shorter.

Typical documents on a Hamilton desk:

• Treaty wording and endorsements, including hours, event, reinstatement, and collar
• Structure charts and layer diagrams that must still lose to the wording if they disagree
• SOVs and exposure files for peak zones, with as-at dates
• Cat model reports as PDFs, not as a pasted AAL in an email
• For ILS: offering circular, indenture, reset file, calculation-agent report
• Premium, claims, and recovery bordereaux from US and international cedents
• Collateral statements and trustee reports where the vehicle is funded

Sidecars add a second books-and-records problem. The sidecar takes a share of a defined portfolio. The ceding Class 4 still has the original treaty. Bordereaux must be producible for both. If the portfolio definition in the sidecar agreement excludes a class that the inbound cedent bordereau still contains, those rows are exceptions, not "close enough for Hamilton."

ACME Construction Ltd as a US wind cession

Walk a fictional file. ACME Construction Ltd, domain acme.example, is a Florida and Gulf contractor whose primary carrier buys a 6/1 cat XoL in Bermuda. The slip names occupancy contractors, territory USA including Florida, attachment USD 50,000,000, limit USD 100,000,000, 72-hour clause. The SOV includes coastal warehouses in Miami-Dade that the exposure file geocodes to a different cresta than the broker summary. The collar is in endorsement 2. The covering email says "uncolllared this year." The email is not the wording.

A Bermuda underwriter who quotes off the email has not quoted the layer. A pack that extracts attachment, limit, hours, territory, and the endorsement-2 collar, and that leaves the geocode conflict visible, is a pack. The brokers hub is how that file should leave the placing broker. Facultative reinsurance is the sibling if ACME is offered risk-by-risk instead of inside the treaty. Do not drop a facultative ACME certificate into the 6/1 bordereau because the name matched.

The illustration of Bermuda inbound files, labelled as an illustration and not as customer proof, is the Bermuda reinsurer bordereaux illustration. It is not a Class 4 logo and not a BMA outcome.

What Hamilton still has to post

After bind, the work is rows. US cedents send premium and claims bordereaux in layouts that were not designed for a Bermuda year of account. Map them to the 6/1 wording, not to last year's spreadsheet headers. Event date versus report date versus hurricane season still has to match the hours clause. If a claims bordereau splits one named storm across two rows without an event identifier, attachment to the layer cannot be shown. That is a gap.

Retrocession sitting in Bermuda — the Class 4 buying its own cover, or an ILS transformer taking a slice — is another wording. The treaty hub treats retro as a treaty with a different counterparty. Do not net it in the same sheet as inbound cessions because both say CAT.

This page will not invent a coupon, a probability of attachment, or an ROI from ILS. It will not list carrier logos. It will not claim SOC 2 as a Bermuda market fact. Capital models and cat models remain the carrier's. Software can cite the collar, the 6/1 incept, and the SOV cell that disagrees with the slip.