Colombia's Reserve Requirements Shift Large-Value Payments to Later Hours

The Shift in Intraday Settlement Timing

Colombia's large-value payment system (CUD) has experienced a notable structural change in the intraday timing of transaction settlements, a phenomenon analysed by BIS Working Papers covering the period from 2018 to 2025. This shift involves a pronounced concentration of payment activity towards the later hours of the operational day, moving away from earlier settlements.

The analysis indicates that this re-timing is primarily associated with specific policy adjustments in reserve requirements and the introduction of new financial infrastructure.

Understanding these dynamics is critical for central banks and financial institutions, as the timing of settlements directly influences the efficiency of payment flows, the management of systemic liquidity, and the overall stability of the financial system.

The observed changes reveal how regulatory modifications can produce measurable behavioural responses among financial entities in their daily liquidity deployment strategies, reshaping the fundamental rhythm of interbank transfers.

This phenomenon, while specific to Colombia, offers broader lessons for other jurisdictions considering similar reforms to enhance liquidity management or modernise their payment infrastructures, highlighting the intricate relationship between regulation and market behaviour.

Policy Driver: Reserve Requirement Adjustments

A primary driver of this observed shift in settlement timing relates directly to reductions in reserve requirements implemented by Colombia's central bank. The BIS Working Papers analysis, utilising high-frequency transaction data, specifically points to two periods of such reductions: April 2020 and September 2024.

These policy adjustments directly influence the amount of liquidity financial institutions must hold as reserves, thereby affecting their available funds for intraday payment obligations.

By decreasing the mandatory reserve buffers, institutions gain greater flexibility in managing their liquidity, which, as the data demonstrates, has translated into a strategy of deferring large-value settlements.

This approach allows institutions to optimise their use of available funds throughout the day, potentially reducing the need for early-day liquidity provisions and instead relying on incoming payments and other short-term funding mechanisms.

The reductions effectively lowered the opportunity cost of holding reserves, encouraging institutions to manage their liquidity more dynamically rather than maintaining static, large early-day balances.

Infrastructure Catalyst: The New Securities Depository

Complementing the impact of reserve requirement adjustments, the introduction of a new Central Securities Depository (DCV) system in April 2024 further reinforced the trend towards later settlements.

The BIS Working Papers analysis shows that this institutional development, alongside changes in payment volume and value, contributed to the re-timing of transactions within the CUD.

A modernised securities settlement system typically offers enhanced capabilities for real-time processing and efficient collateral management, which can alter how financial institutions approach their intraday funding needs. The integration of a new CSD often streamlines the settlement of securities transactions, which are frequently linked to large-value payments.

This increased efficiency in securities settlement may empower institutions to delay the finalisation of related cash payments, allowing them to better match outflows with expected inflows over the course of the business day.

Such infrastructure improvements reduce the operational friction associated with late-day settlements, making the deferred payment strategy more feasible and less risky for participants.

Mechanism: Evolving Intraday Liquidity Management

The underlying mechanism for this shift lies in financial institutions' evolving strategies for intraday liquidity management. With reduced reserve requirements, institutions have less capital held at the central bank that cannot be immediately deployed.

The BIS Working Papers analysis reveals a greater reliance on intraday repurchase agreements (repos) as opposed to holding excess reserves. This strategy allows institutions to acquire necessary liquidity for short periods during the day, settling obligations as they arise without needing to maintain substantial early-day balances.

This approach reduces early-day payment activity, as institutions wait for incoming payments or secure intraday funding before initiating large outflows.

The analysis concludes that this method improves overall liquidity management later in the business day, as institutions can more precisely calibrate their funding needs against real-time payment flows and market conditions, thereby optimising the use of their capital.

This shift reflects a more active and dynamic approach to liquidity positioning, where funds are acquired and deployed as needed rather than pre-positioned in anticipation of daily obligations.

Differentiated Impact on Financial Institutions

While the general trend indicates a shift towards later settlements, the BIS Working Papers analysis also highlights heterogeneous effects across different financial institutions. Specifically, smaller institutions exhibit a greater dependence on marginal liquidity and the timing of incoming payments within the interdependent payment network.

This suggests that while larger institutions might have more sophisticated tools or broader access to intraday funding markets, smaller entities remain more sensitive to the immediate availability of funds. Their ability to defer settlements might be more constrained by the need to receive payments from other network participants before they can fulfil their own obligations.

This differential impact underscores the importance of considering institutional size and market access when evaluating the effects of payment system reforms and changes in reserve policy, as the aggregate trend may mask varying degrees of flexibility and vulnerability among participants.

The reliance on incoming payments means smaller institutions may experience greater exposure to late-day gridlock or settlement delays if their counterparties also defer payments.

Empirical Foundation: High-Frequency Transaction Data

The findings presented in the BIS Working Papers are grounded in an analysis of high-frequency transaction data from Colombia's large-value payment system (CUD), covering the period from 2018 to 2025.

This extensive dataset provides granular insights into the precise timing and volume of payments, allowing researchers to observe and quantify behavioural changes following policy and institutional interventions. The use of such detailed, real-time transaction records enables a robust examination of how liquidity conditions and regulatory frameworks shape settlement patterns.

By tracking individual transactions over a multi-year horizon, the analysis can isolate the effects of specific events, such as the reserve requirement reductions in April 2020 and September 2024, and the launch of the new DCV system in April 2024, providing empirical evidence for the observed shift towards later intraday settlements.

This methodological approach lends significant credibility to the conclusions, moving beyond anecdotal observations to present a data-driven account of evolving payment system dynamics.

Assessing the Trade-Offs and Systemic Implications

While the analysis demonstrates a clear association between policy changes and settlement timing, one might consider whether the observed shift represents a purely efficiency-driven outcome or if it introduces new forms of systemic risk.

Some could argue that delaying settlements allows for better liquidity optimisation, reducing the overall need for reserves and potentially lowering funding costs for financial institutions.

However, the concentration of settlement activity towards the end of the day can also create operational pressures and increase the risk of gridlock if a major participant faces unexpected liquidity shortfalls late in the cycle. The BIS Working Papers analysis does not explicitly dismiss these concerns but rather focuses on documenting the observed behavioural change.

The heterogeneous effects, particularly for smaller institutions, suggest that the benefits of deferred settlement may not be uniformly distributed, potentially increasing their vulnerability to late-day liquidity shocks if incoming payments are delayed.

This trade-off between efficiency gains and potential increases in late-day settlement risk requires careful monitoring by central banks.

Consequences for Asian Financial Market Regulators

For Asian financial markets, the insights from Colombia's experience underscore the critical role of central bank policy in shaping intraday liquidity and payment system behaviour.

As several Asian economies continue to modernise their payment infrastructures and calibrate reserve requirements, the observed shift towards later settlements in Colombia provides a relevant case study.

Central banks in Asia, such as the Bank of Thailand or Bank Indonesia, which regularly review their liquidity frameworks, should consider the potential for similar re-timing effects when adjusting reserve ratios or implementing new real-time gross settlement (RTGS) or central securities depository systems.

A concentration of settlements late in the day could increase demand for intraday liquidity facilities, potentially affecting short-term money market rates or requiring adjustments to standing liquidity provisions.

Decision-makers should monitor transaction data from their own large-value payment systems, particularly following any policy changes, to detect shifts that could influence systemic liquidity management and operational risk, with specific attention to the 2025-2026 data prints for any emerging patterns indicating a similar concentration of payment activity.