Trustless – Participation in ROSCA Games

In this study, we propose a mechanism for rotational savings and credit associations (ROSCAs) by matching players into pools based on an anonymity rating while privacy and regulatory auditability are preserved; and fees and penalties guarantee collateral. We replace the conventional local trust, reputation, and social enforcement of these games with actuarially manufactured trust. We posit the generalization of cycle length from the usual lunar cadence to variable arbitrary periods. In fact, in Zimbabwe, ‘Rounds’ now vary the payout avenue itself, from regular cash contributions to formal bank transfers, mobile money and the dispensing of goods and groceries. We explore ex‑ante solvency via concentration bounds, budget non‑deficit under simple collateral schedules and individual rationality. Our study hints at the premise that actuarially mediated trust enables scalability, anonymity, and resilience to default.