A key area of impact is the methodology for calculating exposure from derivatives. For linear instruments such as futures or equity swaps, firms will be expected to report the full notional value of the underlying securities. For non-linear instruments, including options, exposure must be determined by applying delta to the notional amount. This distinction introduces a layer of calculation that requires not only accurate instrument classification but also access to reliable, up-to-date pricing and risk metrics. Importantly, these inputs are inherently market-sensitive. Factors such as underlying price movements, volatility, and time decay can cause delta to fluctuate, meaning that exposure levels can change even in the absence of any trading activity.
This creates an additional layer of complexity: disclosure is no longer driven solely by position changes, but also by market movements. Delta-driven instruments, in particular, introduce real volatility into reported exposures, requiring firms to monitor positions closely to ensure that threshold triggers are identified in a timely manner.
The treatment of derivatives referencing ETFs or baskets adds another dimension. Firms will need to disaggregate exposures and identify underlying issuer positions where certain thresholds are met. This effectively shifts disclosure from an instrument-level view to a look-through approach, requiring more granular data and deeper visibility into the underlying components.
In parallel, the introduction of gross short position reporting represents a material change to existing practices. Firms will no longer be able to net short positions against long exposures for disclosure purposes. Instead, short positions must be reported in full, requiring separate tracking and aggregation logic. This has direct implications for how positions are monitored and reported across portfolios.
Operationally, the move toward a single, machine-readable disclosure form signals a push for standardisation and efficiency in reporting. However, this also raises the bar for data quality and consistency. Firms will need to ensure that all relevant positions — across cash holdings, derivatives, and short exposures — are accurately captured and structured in a format suitable for submission.
While there is a possibility of relief through equivalence with other jurisdictions, this remains subject to regulatory determination. Firms cannot assume exemption and will need to closely monitor developments to understand whether existing reporting frameworks can be leveraged.
Taken together, these reforms highlight a shift toward a more comprehensive and data-intensive disclosure regime. Compliance is no longer confined to tracking legal ownership or straightforward positions. Instead, it requires a detailed understanding of how different instruments contribute to economic exposure, how those exposures should be calculated, and how they must be reported in a consistent and transparent manner.
As implementation approaches, the challenge for firms will not only be interpreting the new requirements, but operationalising them across complex portfolios and systems. The ability to accurately capture, calculate, and report across multiple dimensions of exposure — particularly in an environment where exposures can shift dynamically with market conditions — will be critical to meeting the expectations of the new regime.
Artius Global comments: CP 387 underscores the increasing complexity of modern disclosure regimes, where firms must manage multiple moving parts simultaneously. With deemed economic interests across derivatives, look-through requirements for ETFs and baskets, and the need to report gross short positions without netting, exposures must be continuously tracked, recalculated, and validated. Crucially, these exposures are not static — they are inherently market-sensitive. Factors such as underlying price movements, volatility, and delta-driven changes can cause reportable positions to fluctuate even in the absence of trading activity. The challenge is therefore not only in understanding the rules, but in consistently applying them across evolving positions, instruments, and market data inputs. In this environment, where small shifts in exposure can materially impact disclosure outcomes, maintaining accuracy requires a disciplined approach to managing complexity and ensuring calculations remain aligned, repeatable, and defensible.
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