Evidence-reviewed mapping

SPY ucits alternative: CSPX

BestFolio maps SPY to CSPX as a exact match European-listed alternative, with ISIN IE00B5BMR087. Eligibility depends on the investor's jurisdiction, broker and account type.

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US to European mapping

US ticker

SPY

Original US-listed ETF ticker used in strategy rules and backtests.

Mapped ticker

CSPX

iShares Core S&P 500 UCITS ETF USD (Acc)

Euronext listing: CSPX.AS (Amsterdam)

ISIN

IE00B5BMR087

Universal identifier to search at European brokers.

Confidence

Exact match

CSPX tracks the same index or exposure as SPY; wrapper, costs and income treatment can still differ.

Include an issuer page or KID so the identity can be rechecked.

Exposure and product evidence

Reviewed 7 October 2026

Facts below are tied to this ISIN and share class. Exchange tickers identify trading lines; the ISIN identifies the product.

Source exposure · SPY

S&P 500

Target exposure · CSPX

S&P 500®

Structure / domicile: ETF (UCITS) · Ireland
Distribution: Accumulating
Costs: TER 0.07% p.a.
Replication: Physical ( Full replication )
Mapping method: Same benchmark and daily leverage
Verified listings: London Stock Exchange: CSPX (USD)
Euronext Amsterdam: CSPX (EUR)

Known differences and mismatches

Fund wrapper, fees, tax treatment and exchange closing times can affect returns.
The US and European share classes can have different distribution policies.
The October 2026 monthly tracking test breached a threshold: Same underlying index remains verified; fund fees, withholding and non-synchronous month-end exchange closes affect market-price returns.

Region and broker availability

Listings and trading currencies were checked on 7 October 2026. Availability depends on the broker, country and account.

Search by ISIN and confirm the current KID and order eligibility with your broker before relying on a mapping.

Official product sources

SPY issuer page CSPX fund and listing facts (justETF)

What is CSPX?

CSPX is iShares Core S&P 500 UCITS ETF USD (Acc), the European-listed product BestFolio uses when translating SPY. Most targets are UCITS ETFs; some commodity and leveraged targets are UCITS-eligible ETCs or ETPs instead. Product structure and retail eligibility must be checked for the exact ISIN.

US exposure: S&P 500. European exposure: S&P 500®. Same underlying index and leverage. Accumulating; fund currency USD; primary London Stock Exchange, USD. TER 0.07% p.a.; size EUR 140,449m. Tracking exception: 60 completed months, correlation 0.967, CAGR gap -0.23 pp/year. Same underlying index remains verified; fund fees, withholding and non-synchronous month-end exchange closes affect market-price returns. Sources: issuer and justETF, checked 2026-10-07; https://www.justetf.com/en/etf-profile.html?isin=IE00B5BMR087 The source ticker has 1x exposure and the mapped target has 1x exposure, so BestFolio can flag leverage differences during allocation translation.

Where SPY is used on BestFolio

SPY appears in 36 currently published BestFolio strategy universes or signal rules.