Stablecoin Infrastructure Growth vs. Bank Funding Risk: A Flow Analysis

The foundation for stablecoin adoption is being built on tangible user behavior, not just market cap. A recent survey of over 4,600 holders found that half of stablecoin holders increased their holdings in the last 12 months. This isn't speculative hoarding; it's active accumulation driven by utility. The primary use case is payments, where users demand a simple, universal experience. The data shows a clear gap: while 71% are likely to use a card to spend their stablecoins, actual spending lags, highlighting merchant acceptance as the key friction point.

For this infrastructure to scale, the user experience must feel normal. Holders prioritize universal acceptance, seamless UX, and built-in security-essentially wanting stablecoin payments to work like any other payment. This desire is strongest in emerging markets, with 3 in 4 holders saying it has increased their ability to do business internationally. The growth is supported by a critical shift in regulatory clarity. The U.S. GENIUS Act was signed into law, establishing a federal framework that defines payment stablecoins and sets reserve requirements. This provides a long-term signal for institutional players to build services on top of the technology.

The bottom line is that adoption is moving from niche use to mainstream utility. The on-chain flow of holdings is rising, and the user base is expanding with clear payment intentions. Regulatory progress reduces uncertainty, making it easier for banks and fintechs to integrate stablecoin wallets. The next phase hinges on closing the gap between user desire and merchant reality, which will determine whether this infrastructure truly unifies global money movement.

The Funding Threat: Deposit Disintermediation in EM

The scale of the threat is staggering. S&P projects that stablecoin adoption in emerging markets could swell from $70bn to $730bn. This represents a potential multi-trillion dollar shift in liquidity away from traditional banking systems, directly challenging their core funding model.

The mechanism is straightforward: direct deposit substitution. As stablecoins become a preferred store of value and payment tool, users will convert bank deposits into these digital assets. This isn't a theoretical risk; it's the primary channel through which stablecoins impact bank liabilities. The pressure is especially acute for banks in emerging markets, where the growth trajectory is fastest and where stablecoins are already being used to circumvent local currency volatility and capital controls.

The bottom line is a fundamental reshaping of bank funding bases. If this projection materializes, it would force a costly re-pricing of deposit rates to retain customers and could concentrate the flight of funds among smaller institutions. The regulatory and competitive landscape is set for a major test.

The Market's Reaction: Uneven Bank Equity Impact

The market's verdict on the stablecoin threat is clear and uneven. Following key U.S. legislative milestones, U.S. bank equity prices rose, but the gains were not shared equally. The positive reaction was concentrated among large U.S. banks, while mid-size and community banks saw little or no abnormal returns.

This divergence points directly to the expected competitive impact. The market is pricing in concentrated disintermediation risk, where the threat of deposit flight is seen as most acute for smaller institutions. Large banks are viewed as better positioned to benefit from new stablecoin-related services, such as reserve management, or to absorb the funding pressure through their scale and pricing power.

The bottom line is that the equity market sees a bifurcated future. The threat of stablecoins is real, but its financial impact is expected to be asymmetric, with smaller banks facing the steepest challenges to their traditional funding model.

The Catalyst: GENIUS Act Implementation and Watchpoints

The key regulatory catalyst is now in motion. The GENIUS Act was signed into law in June 2025, and its implementation timeline is critical. The law goes into effect either 18 months after enactment (December 2026) or 120 days after federal regulators issue final rules, whichever comes first. This sets a clear deadline for the market to watch.

The law's reserve requirements are the first major test. It mandates that issuers hold reserves on a one-to-one basis against issued coins, with acceptable assets including U.S. Treasury securities and deposits held at insured depository institutions. Initially, this structure could keep significant flows within the banking system, as stablecoin issuers park cash in banks. The market will scrutinize the final regulations for any relaxation of these rules, which would signal a more direct threat to bank deposits.

The primary watchpoints are two-fold. First, monitor the reserve asset allocation of major stablecoin issuers post-implementation. A heavy tilt toward Treasuries over bank deposits would confirm the disintermediation risk. Second, watch for a shift in stablecoin utility. The law's focus on payments could be undermined if the asset's appeal evolves toward savings, especially if issuers offer yield. Any move away from pure payment use would accelerate the substitution of bank deposits with digital assets.