MainStay S&P 500 Index Fund Investor Class (MYSPX) Fund Overview
Educational signal · not a buy or sell recommendation · How to read this
Beta 1.00: the stock has moved roughly in step with the S&P 500.
For informational purposes only. Not financial advice. Machine-generated analysis by Stock Expert AI — model gpt-4o-mini, generated Jun 14, 2026. Editorial oversight is systemic, not page-by-page. Editorially accountable: Sedat ANAK, Founder and Editor-in-Chief. Data sources: Financial Modeling Prep, Yahoo Finance, SEC EDGAR
Quick AnswerMainStay S&P 500 Index Fund Investor Class (MYSPX) trades at $82.12. MainStay S&P 500 Index Fund Investor Class (MYSPX) is a passively managed fund that aims to replicate the performance of the S&P 500 Index. Sector: Financials.
Price as of · Last analyzed: Jun 14, 2026Analyst Coverage for MYSPX: MYSPX does not currently have published analyst price targets in our coverage universe. This is common for smaller-cap names with limited Wall Street coverage.
MainStay S&P 500 Index Fund Investor Class (MYSPX) Financial Services Profile
MainStay S&P 500 Index Fund Investor Class (MYSPX) provides investors with a straightforward way to gain exposure to the U.S. large-cap equity market by mirroring the performance of the S&P 500 Index, utilizing a passive investment strategy for optimal diversification.
What Is the Investment Thesis for MYSPX?
The investment thesis for MainStay S&P 500 Index Fund Investor Class (MYSPX) hinges on its ability to replicate the performance of the S&P 500 Index effectively. With a market cap of $2.17 billion, MYSPX is positioned to attract a significant investor base seeking exposure to large-cap U.S. equities. The fund's strategy of maintaining at least 80% of its assets in S&P 500 stocks allows it to leverage the index's historical performance, which has averaged annual returns of approximately 10% over the long term. Additionally, the fund's use of options and futures contracts to manage cash levels and minimize transaction costs can enhance returns, especially in volatile markets. However, investors should remain aware of potential risks, including market downturns that could impact overall performance, as the fund is directly tied to the index. Monitoring the fund's tracking error and expense ratio relative to its peers will be crucial for assessing its efficiency and effectiveness in delivering returns.
Based on FMP financials and quantitative analysis
MYSPX Key Highlights
Market capitalization of $2.17 billion, indicating a significant presence in the index fund market.
- Beta of 1.00, reflecting performance that closely aligns with the overall market movements.
- At least 80% of assets dedicated to S&P 500 equities, ensuring strong alignment with large-cap U.S. stocks.
- Utilization of options and futures contracts to maintain liquidity and minimize transaction costs.
- No dividend yield, focusing solely on capital appreciation through equity investments.
Who Are MYSPX's Competitors?
MYSPX is benchmarked below against 8 industry peers on price, market cap, and our AI MoonshotScore.
| Company | Price | Change | Market Cap | MoonshotScore |
|---|---|---|---|---|
| SPY SPDR S&P 500 ETF | $769.64 | +0.74% | $820B | — |
| IVV iShares Core S&P 500 ETF | $773.10 | +0.75% | $896B | — |
| VFIAX Vanguard 500 Index Fund Admiral Shares | $712.69 | +0.74% | $1.72T | — |
| BLK BlackRock, Inc. | $1059.63 | -0.44% | $164B | 49 5-pillar |
| BX Blackstone Inc. | $111.74 | -0.45% | $135B | 67 5-pillar |
| APOS Apollo Global Management, Inc. | $25.59 | -0.23% | $74.8B | 55 5-pillar |
| BAM Brookfield Asset Management | $44.85 | +0.65% | $71.6B | 58 5-pillar |
| AMP Ameriprise Financial, Inc. | $490.91 | -0.79% | $44.1B | 76 5-pillar |
AI Score by Stock Expert AI · Price data: FMP / Yahoo Finance
What Are MYSPX's Key Strengths?
Directly mirrors the performance of the S&P 500 Index, providing reliable returns.
- Low management fees compared to actively managed funds.
- Strong diversification across large-cap U.S. equities reduces risk.
What Are MYSPX's Weaknesses?
No dividend yield, focusing solely on capital appreciation.
- Performance is directly tied to the S&P 500, making it vulnerable to market downturns.
- Limited ability to outperform the index due to passive management strategy.
What Threats Does MYSPX Face?
- Market volatility could adversely impact fund performance.
- Increased competition from other index funds and ETFs.
- Regulatory changes in the financial services industry could affect operations.
What Are MYSPX's Competitive Advantages?
- Strong brand recognition associated with the S&P 500 Index.
- Inherent diversification reduces company-specific risk for investors.
- Low-cost structure compared to actively managed funds enhances competitiveness.
What Does MYSPX Do?
MainStay S&P 500 Index Fund Investor Class (MYSPX) is designed to provide investors with a performance that closely mirrors the S&P 500 Index, which is a benchmark for large-cap U.S. equities. The fund was established to cater to investors seeking broad market exposure with an emphasis on minimizing risks associated with individual stock investments. By allocating at least 80% of its capital to the equities within the S&P 500, MYSPX aims to replicate their relative weights as accurately as possible. This strategy not only includes investments in common stocks but also allows for up to 20% of total assets to be allocated to options and futures contracts. These derivatives are strategically employed to maintain liquidity, streamline trading activities, and minimize transaction costs, thereby enhancing overall fund performance. MYSPX's structure positions it as a competitive choice among index funds, particularly for investors looking for a low-cost, diversified investment vehicle that tracks a major market index. The fund's performance is directly tied to the S&P 500's constituents, making it a reliable option for those aiming to achieve returns that reflect the broader U.S. equity market. As of now, MYSPX has a market capitalization of $2.17 billion and a beta of 1.00, indicating its performance closely aligns with market movements.
What Products and Services Does MYSPX Offer?
- MainStay S&P 500 Index Fund Investor Class aims to replicate the performance of the S&P 500 Index.
- The fund invests at least 80% of its assets in the equities that comprise the S&P 500.
- It utilizes options and futures contracts to maintain liquidity and minimize transaction costs.
- The fund is designed for investors seeking broad exposure to the U.S. large-cap equity market.
- MYSPX focuses on capital appreciation rather than dividend income.
- The fund is passively managed, aiming to minimize tracking error relative to the S&P 500.
How Does MYSPX Make Money?
- MYSPX generates revenue primarily through management fees charged on assets under management.
- The fund's structure allows it to capitalize on the performance of the S&P 500 Index without incurring high operational costs.
- Investments in options and futures contracts can enhance returns and manage cash levels effectively.
What Industry Does MYSPX Operate In?
The asset management industry, particularly in the realm of index funds, has seen substantial growth as investors increasingly favor passive investment strategies over active management. The S&P 500 Index itself represents a significant portion of the U.S. equity market, and funds like MYSPX are designed to capitalize on this trend. As of 2023, the index has shown resilience, with average annual returns attracting a wide array of investors. MYSPX competes with other index funds that track the S&P 500, and its strategic focus on maintaining low costs and minimizing tracking error positions it favorably within this competitive landscape. The growing trend toward passive investing is expected to continue, driven by investor demand for low-cost, diversified investment vehicles.
Who Are MYSPX's Key Customers?
- Individual investors seeking diversified exposure to U.S. equities.
- Institutional investors looking for passive investment options.
- Retirement accounts and funds aiming for long-term capital appreciation.
Research confidence
Thin evidence — scoring coverage unknown. Treat this as a starting point, not a conclusion.
- ● Scoring coverage unknown
- ● Price is current
- ● No filing on record
- ● No analyst coverage
- ● This is a fund, not an operating company
MoonshotScore History
Recorded daily since 2026-08-23 · 41 snapshots
| 2026-08-23 | 44 |
| 2026-08-31 | 44 |
| 2026-09-08 | 44 |
| 2026-09-16 | 44 |
| 2026-09-24 | 44 |
| 2026-10-04 | 44 |
What changed?
The score has stayed at 44.
Over the same 30 days the stock moved -0.3%.
MYSPX Financials
Bull Case vs Bear Case
Bull Case
- Directly mirrors the performance of the S&P 500 Index, providing reliable returns.
- Low management fees compared to actively managed funds.
- Strong diversification across large-cap U.S. equities reduces risk.
Bear Case
- No dividend yield, focusing solely on capital appreciation.
- Performance is directly tied to the S&P 500, making it vulnerable to market downturns.
- Limited ability to outperform the index due to passive management strategy.
- Market volatility could adversely impact fund performance.
AI-generated arguments based on insider flow, news sentiment and technicals — not financial advice · June 2026
MYSPX Latest News
No recent news available for MYSPX.
MYSPX Analyst Consensus
Consensus Rating
Aggregated Buy/Hold/Sell recommendations collected by Financial Modeling Prep for MYSPX.
Price Targets
Wall Street price target analysis for MYSPX.
MYSPX MoonshotScore
MoonshotScore is Stock Expert AI's proprietary 0-100 research rating, not a buy or sell recommendation. No MoonshotScore is published for MYSPX; grades run from A+ (80-100) to F (below 30).
Official Resources
MoonshotScore is not published for this security.
Data provided for informational purposes only.