PFIXvsGMMFETF Comparison
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Simplify Interest Rate Hedge ETF (PFIX) belongs to the Alternatives segment. iShares Government Money Market ETF (GMMF) is part of the Money Market Bonds segment. Both ETFs have the same top 2 sector exposures: Sovereign and Government Agencies. PFIX is more expensive with a Total Expense Ratio (TER) of 0.5%, versus 0.2% for GMMF. PFIX is up 12.42% year-to-date (YTD) with +$16M in YTD flows. GMMF performs worse with 2.5% YTD performance, and +$99M in YTD flows. Run a side-by-side ETF comparison of PFIX and GMMF below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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PFIX vs GMMF performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/18/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | PFIX GMMF | -1.04%+0.29% | +22.20%+0.87% | +12.42%+2.50% | +23.75%+3.62% | +42.02%n/a | +206.40%n/a |
| Flows | PFIX GMMF | -+$1K | -$55M+$14M | +$16M+$99M | +$3M+$122M | +$23M- | -$17M- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | PFIX GMMF | +25.21%+0.10% | +24.74%+0.10% | +35.72%n/a | +36.87%n/a |
| Max drawdown | PFIX GMMF | -5.80%n/a | -17.27%n/a | -36.75%n/a | -36.75%n/a |
| Max drawdown duration | PFIX GMMF | 23dn/a | 71dn/a | 568dn/a | 568dn/a |
Trading data
PFIX | GMMF | |
Last sale 9/18/2026 at 1:30 PM | $53.23 | |
| Previous close 09/17/2026 | $52.28 | |
| Consolidated volume 09/17/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Main metrics
Last update 9/18/2026 at 1:30 PM
Live
Closed
PFIX | GMMF | |
|---|---|---|
| Last price | $53.23 | – |
| 1D performance | +1.82% | – |
| AuM | $183.48 M | $190.52 M |
| E/R | 0.5% | 0.2% |
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Exposure
Countries
PFIX
USA
79.98%
Other
20.02%
GMMF
USA
98.55%
Other
1.45%
Sectors
PFIX
Sovereign
74.98%
Other
25.02%
GMMF
Sovereign
81.73%
Government Agenci.
16.82%
Other
1.45%
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Diversification
PFIX
Total weight of top 15 holdings out of 15
74.55%
GMMF
Total weight of top 15 holdings out of 15
67.45%
Top 15 holdings
Data as of July 31, 2026
PFIX
USA, Bills 0% 31dec2026, USD (182D)
26.83%
USA, Bills 0% 3dec2026, USD (182D)
22.70%
USA, Bills 0% 20aug2026, USD (182D)
8.92%
USA, Bills 0% 1sep2026, USD (119D)
8.49%
USA, Bills 0% 15oct2026, USD (182D)
5.51%
Freddie Mac, FRN 22sep2027, USD
0.32%
USA, Notes FRN 31jul2026, USD (BF-2026)
0.27%
USA, Notes FRN 31jul2027, USD (BF-2027)
0.22%
FHLB, 0% 7aug2026, USD (365D)
0.22%
FHLB, 0% 21aug2026, USD (365D)
0.22%
FHLB, 0% 27aug2026, USD (365D)
0.22%
FHLB, 0% 3sep2026, USD (365D)
0.18%
USA, Notes FRN 31oct2027, USD (BK-2027)
0.15%
FHLB, 0% 28aug2026, USD (365D)
0.15%
USA, Bills 0% 8oct2026, USD (182D)
0.15%
GMMF
USA, Bills 0% 4aug2026, USD (119D)
16.57%
USA, Bills 0% 11aug2026, USD (119D)
13.09%
USA, Bills 0% 1oct2026, USD (364D)
6.52%
USA, Bills 0% 25aug2026, USD (119D)
5.97%
USA, Bills 0% 20aug2026, USD (182D)
5.65%
USA, Bills 0% 15sep2026, USD (119D)
3.65%
USA, Bills 0% 1sep2026, USD (119D)
2.39%
USA, Bills 0% 27aug2026, USD (182D)
2.21%
USA, Bills 0% 28jan2027, USD (182D)
1.96%
USA, Notes FRN 30apr2028, USD (BB-2028)
1.89%
USA, Bills 0% 18aug2026, USD (119D)
1.88%
USA, Bills 0% 3sep2026, USD (364D)
1.75%
USA, Bills 0% 6aug2026, USD (364D)
1.46%
USA, Bills 0% 17nov2026, USD (119D)
1.39%
Federal Farm Credit Banks, FRN 20oct2026, USD
1.08%
Frequently asked questions about PFIX and GMMF
How have the PFIX and GMMF ETFs performed in 2026?
As of September 18, 2026, PFIX is up 12.42% year-to-date (YTD), while GMMF has returned 2.5%. That puts PFIX better performer ahead so far this year.
Which ETF is attracting more investor money: PFIX or GMMF?
Year-to-date, the PFIX ETF saw +$16M in flows, compared to +$99M for GMMF.
Which ETF is more volatile: PFIX or GMMF?
Over the past year, PFIX had a volatility of 24.74%, while GMMF experienced 0.1%.
Which ETF is bigger: PFIX or GMMF?
As of September 18, 2026, PFIX holds $183.48 M in assets under management (AUM), while GMMF manages $190.52 M.
What sectors do the PFIX and GMMF ETFs invest in?
PFIX leans toward sectors like Sovereign. Meanwhile, GMMF focuses on Sovereign and Government Agencies.
What are the top holdings of the PFIX ETF and GMMF ETF?
PFIX top holdings include USA, Bills 0% 31dec2026, USD (182D), USA, Bills 0% 3dec2026, USD (182D) and USA, Bills 0% 20aug2026, USD (182D). GMMF holds in its top three: USA, Bills 0% 4aug2026, USD (119D), USA, Bills 0% 11aug2026, USD (119D) and USA, Bills 0% 1oct2026, USD (364D).
Which ETF is more diversified: PFIX or GMMF?
PFIX holds 170 securities with 74.55% of its assets in the top 15. GMMF has 141 securities and a top 15 weight of 67.45%.
Latest news about PFIX & GMMF
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