Definition:Facultative obligatory treaty (fac-ob)
🔗 Facultative obligatory treaty (fac-ob) is a hybrid reinsurance arrangement that grants the cedent the option — but not the obligation — to cede individual risks into the treaty, while the reinsurer is obligated to accept any risk the cedent chooses to cede, provided it falls within the treaty's defined terms. This structure sits between a pure facultative placement (where both sides negotiate each risk individually) and a standard obligatory treaty (where all qualifying risks are automatically ceded and accepted). The fac-ob gives the cedent significant flexibility and strategic control over which risks it retains versus which it passes to reinsurers.
⚙️ Under a fac-ob treaty, the contract specifies parameters such as eligible lines of business, classes of risk, geographic scope, maximum cession limits, and pricing terms. The cedent's underwriters then evaluate each risk as it comes through the door and decide whether to cede it into the fac-ob or retain it on the company's net account (or place it into other reinsurance arrangements). Once the cedent declares a risk into the treaty, the reinsurer must accept its share — there is no case-by-case right of refusal. This asymmetry creates an inherent adverse selection concern for reinsurers, who may fear that cedents will cede only their least desirable risks. To mitigate this, reinsurers typically impose tighter underwriting guidelines, require detailed bordereaux reporting, and may include aggregate caps or event limits within the treaty. In the Lloyd's market, fac-ob treaties are used by syndicates and coverholders seeking flexibility in specialty lines such as marine, energy, and property.
⚠️ The fac-ob structure occupies an important niche precisely because it addresses situations where neither pure facultative nor pure treaty reinsurance is ideal. A cedent writing a heterogeneous book — perhaps a mix of standard and non-standard property risks across multiple regions — may find that a standard treaty either imposes too rigid a cession requirement or fails to accommodate unusual exposures. The fac-ob lets the cedent cherry-pick which risks benefit most from reinsurance support while keeping attractive risks net. However, the adverse selection dynamic means reinsurers price fac-ob treaties with a premium over comparable obligatory covers, and the availability of fac-ob capacity tends to tighten during hard market cycles when reinsurers are more cautious about open-ended commitments. Cedents that manage their fac-ob relationships transparently — sharing data, maintaining consistent cession quality — tend to secure more favorable long-term terms.
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