Here is a description of the product in French:

CAPITALISATION
1/ Opération d'épargne pratiquée par les "sociétés de capitalisation". Les titres détenus par l'épargnant s'appellent des "contrats de capitalisation". 2/ L'assurance par capitalisation consiste à accumuler les primes ou cotisations versées par un Assuré et, lorsque se produit l'événement prévu au contrat, à lui remettre (sous forme de rente ou de capital), les sommes ainsi cumulées, majorées d'un taux d'intérêt minimum fixé au contrat et revalorisable par une participation aux bénéfices.
http://www.sarpgn.fr/pages/lexique.html

And here is a text in English that includes the concept:

When comparing the premium costs of a fully insured health plan with the costs of self-insurance, consider the following factors related to self-insurance plans: projected claims for the plan year less any investment returns on reserves; the costs of either hiring a third party administrator (TPA) or having current or additional company staff handle plan administration; and any necessary stop-loss insurance premiums. If this analysis reveals cost savings that are significant enough to justify the associated risk of self-insurance and the company can weather potential claims volatility, Controllers can move on to the next question: Is the company's cash flow strong and consistent enough to handle the potentially volatile peaks and valleys of claims that often occur in a self-insured plan? By contrast, a fully insured plan has a set premium that is easily budgeted. www.bfmag.com/archives/appfiles/ Article.cfm?IssueID=65&ArticleID=4155

If this were an individual rather than a company, it would fit in the category of "savings plan insurance." This is the kind of retirement "insurance" that some US Republicans have been trying get the US public to swallow as a solution to the "Social Security problem."