Key Morningstar Metrics for Amundi Core S&P 500 Swap UCITS ETF LSPX
- : GoldMorningstar Medalist Rating
- : HighProcess Pillar
- : Above AveragePeople Pillar
- : AverageParent Pillar
Amundi S&P 500 ETF offers low-cost passive exposure to US large-cap equities, an area in which active managers have struggled to demonstrate their value. This exchange-traded fund’s synthetic replication method also means it benefits from a tax-based performance advantage versus both the S&P 500 and its physically replicated peers. For these reasons, this fund represents a strong investment proposition for those seeking exposure to US equities.
The fund’s target index offers giant- to mid-cap exposure, comprising 500 names that cover around 80% of the US equity market’s free-float-adjusted market capitalization.
By only adding stocks that have had positive earnings for a year, the S&P 500 has exhibited a slight quality tilt compared with other broadly representative indexes such as MSCI USA. Constituents are determined by an index committee, which gives the index a greater degree of flexibility than its peers that follow more mechanical rules.
This has also resulted in some controversial outcomes, including the delay in the addition of large tech players such as Tesla.
The US equity markets are widely considered to be some of the most liquid and efficient on earth, rapidly absorbing market information and severely limiting active managers’ ability to add value. Morningstar research has shown that net active decisions have tended to hurt returns over time.
This competitively priced fund is among the most cost-effective S&P 500 trackers available.
The Tax Benefits of Synthetic S&P 500 ETFs
When it comes to investing in US equities, fund domicile and replication method are crucial because they dictate how much withholding tax an investor must pay.
For example, this fund is synthetically replicated and therefore pays 0% withholding tax, which is less than that borne by both its physically replicated peers and by the S&P 500. For this reason, this fund holds a durable performance advantage over many of its peers and regularly outperforms its index after fees. A synthetic approach to replication also introduces some counterparty risk, which must be weighed against the clear performance benefits of the structure.
This fund’s long-term risk-adjusted returns have ranked in the top quartile of its peer group, which includes both active and passive options.
The fund is managed by Amundi, whose long-tenured and resourced portfolio management team earn a People Pillar rating of Above Average.
In sum, this fund delivers ultralow-cost representative beta exposure to a market where passive approaches have performed so well that they have become the default option.
Amundi Core S&P 500 Swap UCITS ETF: Performance Highlights
Comparing the fund’s share classes with their average US large-cap blend category peers, the fund has outperformed over the three-, five-, and 10-year periods on both an absolute and risk-adjusted basis.
According to Morningstar’s European Active/Passive Barometer, over the 10-year period to Dec. 31, 2025, only around 5% of active managers in the US large-cap blend equity segment both survived and outperformed their passive peers. This starkly illustrates the challenges facing active managers in this highly efficient market and reinforces the case for low-cost, representative passive exposure.
US equities experienced significant volatility in 2025. Following the tariff announcement on April 2, markets fell by more than 19% before rebounding sharply on April 9 after President Donald Trump announced a pause on tariffs. Despite this turbulence, large- and mid-cap US equities ultimately delivered strong returns for the year, rising by around 17%, with artificial intelligence-related stocks in the technology and communication-services sectors driving much of the upside.
However, over the one-year period to the end of January 2026, US equities underperformed both emerging markets and developed ex-US equities on both an absolute and risk-adjusted basis.
Looking beyond the past year, US equities have delivered strong long-term performance, comfortably outperforming developed ex-US and emerging markets over the three-, five-, and 10-year periods on both an absolute and risk-adjusted basis. Growth stocks have played an outsized role in this success, benefiting from a prolonged period of low interest rates and rapid advances in scale-dependent technologies such as artificial intelligence.
Should Investors Worry About S&P 500 Concentration Risk?
Seven mega-cap technology stocks, commonly referred to as the Magnificent Seven (Alphabet, Amazon.com, Apple, Meta Platforms, Microsoft, Nvidia, and Tesla), have been the primary beneficiaries of this trend. Their growing dominance has heightened concerns around market concentration. For example, the weight of the top 10 holdings in the S&P 500 increased from 18% to 38% over the trailing 10-year period.
This rising concentration may concern investors in market-cap-weighted strategies who anticipate a reversion toward lower concentration levels. Cap-weighted indexes can be vulnerable to bubbles, as they mechanically allocate more capital to stocks whose prices have risen while underweighting those that have lagged. During the late-1990s dot-com boom, for instance, US equity benchmarks became heavily exposed to technology, media, and telecommunications stocks, many of which subsequently collapsed.
That said, the depth, liquidity, and efficiency of the US equity market, the largest and most liquid globally, have historically offered limited informational advantages to active managers, helping to explain the persistent difficulty of outperforming passive benchmarks.
Beyond market efficiency, the ETF’s passive tracking approach provides an additional structural advantage. Investors also benefit from the tax efficiency of the synthetic replication model used to track qualified US equity indexes such as the S&P 500. Synthetic ETFs are exempt from the dividend withholding taxes that apply to physical ETFs (typically 15%-30%, depending on domicile), providing a durable return advantage. Investors should, however, weigh the potential for higher returns against the exposure to swap counterparty risk.
