JMST vs SPY: Holdings Overlap
JMSTJPMorgan Ultra-Short Municipal Income ETF
JPMorgan · 1799 holdings · $7.1B · as of 2026-05-31
SPYState Street® SPDR® S&P 500® ETF Trust
State Street (SPDR) · 504 holdings · $812.0B · as of 2026-08-06
Holdings snapshots are 67 days apart (JMST: 2026-05-31, SPY: 2026-08-06). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are JMST and SPY?
JPMorgan Ultra-Short Municipal Income ETF (JMST, by JPMorgan) holds 1799 positions; State Street® SPDR® S&P 500® ETF Trust (SPY, by State Street (SPDR)) holds 504. They have 0 holdings in common, and by portfolio weight the two funds are 0.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 0JMST holds 1799 · SPY holds 504
- Weight in Shared Holdings
- JMST 0%·SPY 0%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in JMST
1799 of 1799 positions (72.5% of the fund) are not held by SPY. Showing the top 30 by weight.
- State of Washington, Various Purpose, Series R-2026A0.90%
- State of Minnesota, Various Purpose, Series 2025D0.78%
- Township of Woodbridge0.71%
- Bergen County Improvement Authority (The), Guaranteed Government Pooled Project, Series 2026A0.68%
- County of Hamilton Sales Tax, Series 20250.66%
- City of Bristol0.59%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| JMST | +0.2% | +1.4% | +2.5% | +3.4% | +2.3% | — | 2.61% |
| SPY | +3.4% | +14.0% | +23.7% | +21.2% | +13.3% | +15.3% | 0.97% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in JMST vs SPY →
Shared Holdings(0)
These two funds have no holdings in common.
Frequently Asked Questions
How much do JMST and SPY overlap?
JMST and SPY overlap by 0.0% of portfolio weight. They share 0 holdings (JMST holds 1799 positions and SPY holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both JMST and SPY?
The two portfolios are 0.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What does JMST own that SPY doesn't?
1799 positions (72.5% of JMST) are unique to JMST, led by State of Washington, Various Purpose, Series R-2026A, State of Minnesota, Various Purpose, Series 2025D and Township of Woodbridge. In the other direction, 504 positions (99.9% of SPY) are unique to SPY.