SMXAX Performance — Siit Extended Market Index Fund, Class A
Data updated: 2026-09-28
SMXAX returned +10.80% year to date and +30.41% over one year to May 2026. Annualised returns are +21.35% over 3 years and +7.03% over 5 years. Against its US Small Blend category average the fund came out ahead over three years but behind over one: $100 invested three years ago grew to $179, against $160 for the category, and to $130 over one year, against $132. Volatility over the past three years was 18.51% a year. In the 12 months to May 2026 the fund lost a net $10.3M, and assets reached $1.31B.
SMXAX Growth of $100
What $100 invested in Siit Extended Market Index Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Small Blend category average over the same months.
| Period | SMXAX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $130 | $132 |
| 3 years (Jun 2023 – May 2026) | $179 | $160 |
| 5 years (Jun 2021 – May 2026) | $140 | $135 |
| Since data start (Sep 2019 – May 2026) | $228 | $206 |
SMXAX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +10.80% |
| 1 year | +30.41% |
| 3 years (annualised) | +21.35% |
| 5 years (annualised) | +7.03% |
SMXAX Annual Returns
Calendar-year total returns of Siit Extended Market Index Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +10.80% |
| 2025 | +12.88% |
| 2024 | +23.63% |
| 2023 | +14.23% |
| 2022 | −20.52% |
| 2021 | +13.78% |
| 2020 | +44.16% |
| 2019 (Sep–Dec) | −0.78% |
SMXAX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +2.5% | −0.5% | +4.4% | +9.4% | −4.8% | — | — | — | — | — | — | — |
| 2025 | +5.1% | −7.2% | +7.1% | −0.6% | −7.7% | +4.3% | +2.2% | +5.5% | +0.1% | +0.9% | +2.2% | +1.4% |
| 2024 | −2.4% | +10.4% | +3.5% | −6.4% | +3.4% | +0.4% | +6.3% | −0.1% | +11.6% | +0.5% | +1.6% | −5.7% |
| 2023 | +10.7% | −6.5% | +0.4% | −2.2% | −2.8% | −4.0% | +5.9% | +8.3% | +10.9% | −6.2% | −4.9% | +6.2% |
| 2022 | −9.7% | +1.2% | −1.7% | −10.4% | +0.7% | −2.0% | +10.4% | −9.0% | +3.4% | +8.5% | −9.8% | −1.6% |
| 2021 | +2.2% | +7.4% | −0.6% | +4.3% | −0.1% | +2.0% | −1.3% | +3.1% | −5.3% | +5.7% | −3.8% | 0.0% |
| 2020 | −0.6% | +2.1% | +8.8% | +15.6% | −21.1% | +7.6% | +5.9% | +3.8% | +18.1% | +0.3% | −2.7% | +5.1% |
| 2019 | — | — | — | — | — | — | — | — | +4.7% | +1.9% | +1.0% | −7.9% |
SMXAX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 18.51%
- 3-year Sharpe ratio: 0.91 (vs 4.5% risk-free rate)
- Best month: +11.63% (Sep 2024)
- Worst month: −7.67% (May 2025)
SMXAX Fund Flows
Monthly money in and out of Siit Extended Market Index Fund, from SEC Form N-PORT.
- 12-month net flow: −$10.3M
- 12-month gross sales (incl. reinvestments): $272.5M
- Sales ÷ redemptions: 0.96×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $14.7M | $19.3M | −$4.6M |
| Apr 2026 | $17.1M | $12.5M | $4.6M |
| Mar 2026 | $979K | $35.8M | −$34.8M |
| Feb 2026 | $150.1M | $30.5M | $119.6M |
| Jan 2026 | $5.2M | $17.8M | −$12.7M |
| Dec 2025 | $13.8M | $11.9M | $1.8M |
| Nov 2025 | $2.9M | $32.8M | −$29.8M |
| Oct 2025 | $26.2M | $41.1M | −$14.9M |
| Sep 2025 | $15.0M | $7.9M | $7.1M |
| Aug 2025 | $5.1M | $22.2M | −$17.1M |
| Jul 2025 | $8.3M | $21.5M | −$13.2M |
| Jun 2025 | $13.2M | $29.5M | −$16.3M |
SMXAX Assets Under Management
Net assets of Siit Extended Market Index Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $1.31B |
| 2026-02-28 | $1.24B |
| 2025-11-30 | $1.21B |
| 2025-08-31 | $1.21B |
| 2025-05-31 | $1.12B |
| 2025-02-28 | $1.11B |
| 2024-11-30 | $1.24B |
| 2024-08-31 | $1.17B |
| 2024-05-31 | $1.16B |
| 2024-02-29 | $1.34B |
| 2023-11-30 | $1.25B |
| 2023-08-31 | $1.27B |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.