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These are transaction costs incurred indirectly upon acquisition or disposal of assets by a fund,
with the bid-ask spread and market impact (to be discussed next) being the key components.
These costs may vary depending on, among others, the asset in question and underlying market
conditions. For example, bid-ask spreads may range from less than 10 basis points for some
developed market equities in normal times, to more than 5% for high-yield corporate bonds in
stressed market conditions.
In addition, the transparency of bid-ask spreads may vary across assets and their trading
venues. For example, the bid-ask spreads for assets that are traded in centralized exchanges
(e.g., stocks and futures) tend to be more stable and transparent. The bid-ask spreads for assets
that are traded OTC (e.g., corporate bonds) may fluctuate more and may be less transparent.
When the information sources that responsible entities use to determine bid-ask spreads
become less reliable or unavailable, particularly in stressed market conditions, they should use
their professional judgement, trading experience and best efforts to arrive at a reasonable
estimate, which should be typically larger than the costs incurred during normal times, and
aim at a fair treatment of all investors.
Overall, depending on the OEF’s underlying assets and market conditions, responsible entities
should source bid-ask spread information from the relevant commercial data bases, directly
from broker dealers, and / or use estimations based on comparable assets and / or historical
data, with a view to obtaining reasonable inputs to calibrate anti-dilution LMTs. Some
responsible entities use pricing models when the market price is not available. However, those
models should be used with caution and be adjusted as appropriate to reflect generally larger
liquidity costs under stress.
Significant Market Impact
Market impact is another implicit transaction cost incurred, in addition to bid-ask spreads,
when a fund takes / supplies liquidity from / in the market to complete the trading necessary
to meet a net fund flow. For example, when the transaction by an OEF is large in size relative
to the market liquidity, part of the transaction may be executed outside the market ‘screen
price’ and ‘move’ the market price because it takes up a considerable depth of immediately
available liquidity (i.e., ‘on-screen’ liquidity).
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A reasonable input for the estimation of market impact could be to analyse previous
transactions under similar market conditions to compare the difference between the price of
the transaction when the order was placed (i.e., the original market ‘screen price’) and the final
executed price. The difference between screen price and final price after reflecting all execution
costs is sometimes referred to as ‘slippage’. For example, for certain fixed income securities that
do not trade regularly, the screen price is rather an invitation to trade than an executable price.
More generally, there could be a considerable difference between screen price and actual
transacted price in stressed market conditions.
Responsible entities should include significant market impact in the calculation of the cost of
liquidity when calibrating the anti-dilution LMTs. In order to do so, an assessment (e.g.,
slippage assessment) is needed before the sale / purchase is made, taking into account the size
26
See, for example, ALFI Swing Pricing document, update 2022, p.14 at:
https://www.alfi.lu/getattachment/3154f4f7-f150-4594-a9e3-fd7baaa31361/app_data-import-alfi-alfi-
swing-pricing-brochure-2022.pdf.