T+1: Much More Than Shortening the Settlement Cycle by One Day
The transition to T+1 represents one of the most significant operational changes the capital markets industry has experienced in recent decades. While the discussion often focuses on its most widely recognized benefits—such as reduced counterparty risk, lower credit exposure, and improved market efficiency—the true impact of T+1 extends far beyond moving settlement forward by a single day.
The experience of markets that have already completed the transition shows that T+1 should not be viewed as a simple change in settlement timelines, but rather as a catalyst for the operational transformation of the post-trade landscape.
La experiencia de los mercados que ya han completado la migración demuestra que T+1 no debe entenderse como un simple ajuste de plazos, sino como un acelerador de la transformación operativa del modelo post-trade.
From Settlement to Data Quality
One of the key lessons from the transition to T+1 is that the real challenge lies in having accurate, complete, and reconciled data available in a much shorter timeframe.
In a T+2 environment, many issues can be resolved during the day following trade execution. However, as the settlement window shrinks, any error in allocations, settlement instructions, counterparty data, or matching processes becomes business-critical. Reconciliation is no longer an overnight process—it becomes an intraday activity.
As a result, data quality is no longer just a best practice; it is an operational necessity. Organizations must ensure that information flows consistently and almost in real time across the entire post-trade value chain.
The Real Challenge: Managing Exceptions
Although many of the largest market participants already operate with high levels of automation—often achieving straight-through processing (STP) rates of over 95% without manual intervention—the reality across the industry is far more heterogeneous. T+1 presents a different challenge for every participant, and many asset managers, brokers, and mid-sized financial institutions still rely on manual processes for parts of their post-trade operations.
The real challenge lies in the small percentage of trades that generate exceptions.
Allocation errors, settlement instruction discrepancies, matching failures, or incomplete data can consume a significant portion of the limited time available before settlement. Under T+2, firms had sufficient time to investigate and resolve these issues. Under T+1, every hour matters.
For this reason, the success of the transition depends less on automating standard processing and more on the ability to detect, classify, and resolve exceptions as early as possible. Operational visibility and efficient exception (break) management become critical capabilities for achieving timely settlement.
The Growing Importance of Intraday Visibility
Another fundamental shift introduced by T+1 is the need for a far more accurate intraday view of positions, settlement obligations, and funding requirements.
Historically, many control and reconciliation processes have been performed using an end-of-day approach. However, the shorter settlement cycle requires firms to make operational decisions much earlier—often during the trading day itself.
This need for continuous monitoring is gradually bringing post-trade operations closer to the principles of immediacy and observability that have already become standard in other areas of financial services, such as instant payments.
The ability to reconstruct events, identify issues, and anticipate risks in real time is no longer a competitive advantage—it is becoming an operational necessity.
Greater Pressure on Liquidity and Funding
Although T+1 is often presented as a measure to reduce risk, it also introduces new challenges in liquidity management.
The shorter settlement cycle requires firms to accelerate funding processes, collateral mobilization, and the fulfillment of settlement obligations. This increases the need for more accurate forecasting and for tools that provide a consolidated view of both cash and securities positions.
In this environment, intraday liquidity management becomes increasingly important, particularly for brokers, global custodians, and institutions with significant cross-border trading activity.
A Particularly Complex Challenge in Cross-Border Environments
The temporary coexistence of different settlement cycles adds another layer of operational complexity.
The adoption of T+1 in the United States has forced many European firms to adapt their operating models while continuing to interact with markets that still operate under a T+2 settlement cycle. Time zone differences further reduce the effective window available for trade allocations, confirmations, and matching activities.
This highlights the fact that the challenge is not purely technological. It also requires close coordination among market participants, market infrastructures, custodians, central counterparties (CCPs), and post-trade service providers.
T+1 as the Starting Point
Perhaps the most important takeaway is that T+1 is not the final destination for capital markets.
Shortening settlement cycles is part of a broader industry trend toward operating models that are increasingly automated, observable, and closer to real-time execution. Technologies and concepts such as Distributed Ledger Technology (DLT), T+0 settlement, and Atomic Settlement are already shaping the strategic roadmaps of many financial institutions. In this context, T+1 acts as a catalyst, compelling firms to identify manual dependencies, improve data quality, and accelerate their operational transformation initiatives.
Ultimately, T+1 is an opportunity to take a holistic view of post-trade operating models, strengthen their resilience, and prepare them for the next generation of market infrastructure and settlement processes.
How ARENA Can Help
At ARENA, we have spent years supporting financial institutions in post-trade transformation initiatives, helping them enhance operational processes, reconciliation, operational controls, exception management, and data governance in increasingly demanding market environments.
The transition to T+1 requires a combination of deep capital markets expertise and the technological capabilities needed to increase automation, improve intraday visibility, and strengthen control and reconciliation processes. At ARENA, we help our clients assess the operational impact of T+1, define their target operating models, and implement solutions that enable them to successfully navigate the challenges associated with accelerated settlement cycles while building a more resilient and future-ready post-trade ecosystem.
