IBDRvsGMMFETF Comparison
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iShares iBonds Dec 2026 Term Corporate ETF (IBDR) belongs to the US Corporate IG Bonds segment. iShares Government Money Market ETF (GMMF) is part of the Money Market Bonds segment. IBDR's top 3 sector exposures are Finance, Non-Corporate and Technology. In contrast, GMMF's top sector exposures are Sovereign and Government Agencies. IBDR is less expensive with a Total Expense Ratio (TER) of 0.1%, versus 0.2% for GMMF. IBDR is up 2.69% year-to-date (YTD) with -$489M in YTD flows. GMMF performs worse with 2.42% YTD performance, and +$97M in YTD flows. Run a side-by-side ETF comparison of IBDR 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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IBDR vs GMMF performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/10/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IBDR GMMF | +0.33%+0.29% | +1.00%+0.88% | +2.69%+2.42% | +4.04%+3.63% | +17.17%n/a | +8.43%n/a |
| Flows | IBDR GMMF | -$116M+$3M | -$320M+$12M | -$489M+$97M | -$84M+$124M | +$1.42B- | +$2.53B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IBDR GMMF | +0.14%+0.11% | +0.19%+0.10% | +1.36%n/a | +2.92%n/a |
| Max drawdown | IBDR GMMF | n/an/a | -0.05%n/a | -0.68%n/a | -12.75%n/a |
| Max drawdown duration | IBDR GMMF | n/an/a | 6dn/a | 21dn/a | 1102dn/a |
Trading data
IBDR | GMMF | |
Last sale 9/11/2026 at 1:30 PM | $24.19 | |
| Previous close 09/10/2026 | $24.19 | |
| Consolidated volume 09/10/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of August 31, 2026
1-year trailing difference
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GMMF
is actively managed and doesn’t replicate an indexIBDR | GMMF | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/11/2026 at 1:30 PM
Live
Closed
IBDR | GMMF | |
|---|---|---|
| Last price | $24.19 | – |
| 1D performance | +0.00% | – |
| AuM | $3.25 B | $188.49 M |
| E/R | 0.1% | 0.2% |
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Exposure
Countries
IBDR
USA
85.14%
Other
14.86%
GMMF
USA
98.55%
Other
1.45%
Sectors
IBDR
Finance
37.78%
Non-Corporate
20.14%
Technology
10.01%
Other
32.08%
GMMF
Sovereign
81.73%
Government Agenci.
16.82%
Other
1.45%
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Diversification
IBDR
Total weight of top 15 holdings out of 15
35.15%
GMMF
Total weight of top 15 holdings out of 15
67.45%
Top 15 holdings
Data as of July 31, 2026
IBDR
BlackRock Cash Funds - Treasury
20.14%
AbbVie, 2.95% 21nov2026, USD
1.56%
Aercap Holdings, 2.45% 29oct2026, USD
1.55%
Microsoft, 2.4% 8aug2026, USD
1.39%
Citigroup, 3.2% 21oct2026, USD
1.19%
Wells Fargo, 3% 23oct2026, USD
1.17%
JP Morgan, 2.95% 1oct2026, USD
1.09%
Goldman Sachs, 3.5% 16nov2026, USD
1.05%
JPMorgan Chase Bank, 5.11% 8dec2026, USD (25)
0.99%
Morgan Stanley, 4.35% 8sep2026, USD (F)
0.89%
Apple, 2.45% 4aug2026, USD
0.85%
Apple, 2.05% 11sep2026, USD
0.85%
Alphabet, 1.998% 15aug2026, USD
0.81%
Bank of America Corporation, 4.25% 22oct2026, USD (L)
0.81%
Citibank N.A., 5.488% 4dec2026, USD
0.81%
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 IBDR and GMMF
How have the IBDR and GMMF ETFs performed in 2026?
As of September 10, 2026, IBDR is up 2.69% year-to-date (YTD), while GMMF has returned 2.42%. That puts IBDR better performer ahead so far this year.
Which ETF is attracting more investor money: IBDR or GMMF?
Year-to-date, the IBDR ETF saw -$489M in flows, compared to +$97M for GMMF.
Which ETF is more volatile: IBDR or GMMF?
Over the past year, IBDR had a volatility of 0.19%, while GMMF experienced 0.1%.
Which ETF is bigger: IBDR or GMMF?
As of September 10, 2026, IBDR holds $3.25 B in assets under management (AUM), while GMMF manages $188.49 M.
What sectors do the IBDR and GMMF ETFs invest in?
IBDR leans toward sectors like Finance, Non-Corporate and Technology. Meanwhile, GMMF focuses on Sovereign and Government Agencies.
What are the top holdings of the IBDR ETF and GMMF ETF?
IBDR top holdings include BlackRock Cash Funds - Treasury, AbbVie, 2.95% 21nov2026, USD and Aercap Holdings, 2.45% 29oct2026, USD. 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: IBDR or GMMF?
IBDR holds 230 securities with 35.15% of its assets in the top 15. GMMF has 141 securities and a top 15 weight of 67.45%.
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