SPYM’s $100B Milestone Might Be the Last of Its Kind

Core Insights - State Street's SPYM fund has surpassed $100 billion in assets, achieving this milestone in just 283 trading days, making it the fastest fund to grow from $50 billion to $100 billion [2] - The SPYM fund is designed to access the growing retail market with low fees, specifically at just two basis points, but experts suggest that no new core S&P 500 funds are expected soon due to the existing large funds tracking the index [2][3] - The SPYM fund is one of four primary S&P 500 ETF offerings, alongside iShares Core S&P 500 ETF (IVV), Vanguard S&P 500 ETF (VOO), and SPDR S&P 500 ETF Trust (SPY), each catering to different market segments [4] Market Dynamics - The ETF industry is segmented into three main price tiers: low-cost beta funds, mid-priced actively managed funds, and high-priced funds above 75 basis points [5] - In Q3 2025, VOO experienced net inflows of $6.6 billion and is up 17.7% year-to-date, while IVV added $3.6 billion and is up 14.7% year-to-date; in contrast, SPY saw outflows of $1.7 billion and is up 15.6% year-to-date [6]