• Moody's assigned Sky Protocol a B3 issuer rating with a stable outlook on 7 October 2026, reported by The Block as its first rating of a stablecoin protocol.
• S&P rated Sky Protocol B- with a stable outlook; The Block reported it as dated August 2025, and S&P's reported constraints were depositor concentration, centralized governance and weak risk-adjusted capital.
• Both grades are below investment grade, so a rating adds comparability for institutions, not evidence of conservative credit quality.
• The Block reports that Galaxy added $100 million of sUSDS to its corporate treasury in September 2026, a sign of institutional appetite rather than a credit endorsement.
• The Moody's rationale, as relayed by The Block, points to efforts to build reserves and improve capital; the full Moody's report was not reviewed here.

Moody's has assigned Sky Protocol a B3 issuer rating with a stable outlook, according to The Block's report of 7 October 2026, which describes it as the first rating Moody's has given a stablecoin protocol. S&P had already rated the same issuer B-. Both grades sit well below investment grade. The ratings are the agencies' own opinions; this piece relies on trade-press accounts of them, not the agency reports.

What the two ratings say

The two grades point the same way: a stable outlook, but a weak credit position. S&P's B-, reported by The Block and The Defiant, was constrained by a high concentration of depositors, highly centralized governance and weak risk-adjusted capitalization, and S&P called an upgrade highly unlikely within 12 months. The Block's account of the Moody's grade says it reflects growing institutional recognition amid efforts to build reserves and improve capital. Moody's own report was not reviewed.

Why institutions are still moving in

Institutional appetite for USDS is rising despite the grades. The Block reports that in September 2026 Galaxy added $100 million of sUSDS to its corporate treasury and approved sUSDS as collateral across its institutional trading operations. The same report cites a Standard Chartered projection that token-holder income could rise fivefold by 2028. That projection is an analyst forecast relayed by The Block, so it measures expectation, not credit strength.

What a second rating changes

A second grade changes comparability, not the underlying balance sheet. Greg Feibus, Sky's Global Head of Capital Markets, is quoted by The Block saying multiple independent assessments give institutional investors a clearer view of Sky's credit profile. He is an interested party. For treasury and risk teams, the practical value is a recognizable reference point they can place inside existing counterparty and collateral policies, with the sub-investment-grade level written into those limits.

What to watch next

The test is whether the weaknesses S&P named, concentrated depositors, centralized governance and thin capital, narrow as institutional balances grow. Watch for any change in outlook from either agency, further treasury and collateral approvals like Galaxy's, and whether other agencies rate stablecoin protocols. Until the grades move, institutions holding USDS or sUSDS are taking a speculative-grade credit exposure, whatever the demand signals suggest.