C000012160 Performance — Mid-Cap Index Portfolio
Data updated: 2026-08-28
C000012160 returned +11.79% year to date and +16.63% over one year to Jun 2026. Annualised returns are +15.18% over 3 years and +7.80% over 5 years. Against its US Mid-Cap Blend category average the fund came out ahead over three years but behind over one: $100 invested three years ago grew to $153, against $150 for the category, and to $117 over one year, against $122. Volatility over the past three years was 14.34% a year. In the 12 months to Jun 2026 the fund took in a net $133.6M, and assets reached $3.53B.
C000012160 Growth of $100
What $100 invested in Mid-Cap Index Portfolio grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Mid-Cap Blend category average over the same months.
| Period | C000012160 | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $117 | $122 |
| 3 years (Jul 2023 – Jun 2026) | $153 | $150 |
| 5 years (Jul 2021 – Jun 2026) | $146 | $147 |
| Since data start (Jul 2019 – Jun 2026) | $213 | $208 |
C000012160 Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +11.79% |
| 1 year | +16.63% |
| 3 years (annualised) | +15.18% |
| 5 years (annualised) | +7.80% |
C000012160 Annual Returns
Calendar-year total returns of Mid-Cap Index Portfolio, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +11.79% |
| 2025 | +11.54% |
| 2024 | +15.08% |
| 2023 | +15.83% |
| 2022 | −18.82% |
| 2021 | +24.36% |
| 2020 | +18.07% |
| 2019 (Jul–Dec) | +7.47% |
C000012160 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 | +2.1% | +3.4% | −5.8% | +7.7% | +2.0% | +2.4% | — | — | — | — | — | — |
| 2025 | +4.4% | −1.9% | −3.9% | −1.0% | +5.5% | +4.0% | +2.0% | +1.5% | +1.6% | −1.0% | +0.5% | −0.3% |
| 2024 | −1.5% | +5.0% | +4.2% | −4.8% | +2.8% | −0.6% | +4.0% | +2.5% | +2.5% | −0.4% | +8.3% | −6.9% |
| 2023 | +8.0% | −2.7% | −1.1% | −0.7% | −2.7% | +8.4% | +3.5% | −3.6% | −4.9% | −4.7% | +10.0% | +7.1% |
| 2022 | −7.9% | −1.0% | +2.7% | −8.1% | −0.3% | −9.4% | +9.6% | −3.0% | −9.9% | +8.5% | +6.1% | −5.4% |
| 2021 | −0.5% | +5.3% | +2.3% | +4.8% | +0.8% | +1.8% | +1.3% | +3.0% | −4.2% | +6.6% | −2.5% | +3.9% |
| 2020 | −0.2% | −8.8% | −18.5% | +14.5% | +7.1% | +1.9% | +6.5% | +3.2% | −1.7% | −0.1% | +13.4% | +4.1% |
| 2019 | — | — | — | — | — | — | +1.3% | −2.7% | +2.0% | +1.1% | +3.2% | +2.4% |
C000012160 Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 14.34%
- 3-year Sharpe ratio: 0.74 (vs 4.5% risk-free rate)
- Best month: +10.00% (Nov 2023)
- Worst month: −6.87% (Dec 2024)
C000012160 Fund Flows
Monthly money in and out of Mid-Cap Index Portfolio, from SEC Form N-PORT.
- 12-month net flow: $133.6M
- 12-month gross sales (incl. reinvestments): $638.1M
- Sales ÷ redemptions: 1.26×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $21.7M | $33.7M | −$12.0M |
| May 2026 | $22.2M | $29.7M | −$7.4M |
| Apr 2026 | $25.8M | $42.2M | −$16.3M |
| Mar 2026 | $246.7M | $38.7M | $208.0M |
| Feb 2026 | $31.9M | $54.8M | −$23.0M |
| Jan 2026 | $47.1M | $54.5M | −$7.5M |
| Dec 2025 | $40.0M | $46.3M | −$6.2M |
| Nov 2025 | $36.5M | $45.2M | −$8.7M |
| Oct 2025 | $32.0M | $47.3M | −$15.4M |
| Sep 2025 | $43.6M | $37.9M | $5.7M |
| Aug 2025 | $26.5M | $39.8M | −$13.3M |
| Jul 2025 | $64.1M | $34.4M | $29.6M |
C000012160 Assets Under Management
Net assets of Mid-Cap Index Portfolio by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $3.53B |
| 2026-03-31 | $3.17B |
| 2025-12-31 | $3.23B |
| 2025-09-30 | $3.28B |
| 2025-06-30 | $3.10B |
| 2025-03-31 | $2.85B |
| 2024-12-31 | $2.87B |
| 2024-09-30 | $2.88B |
| 2024-06-30 | $2.60B |
| 2024-03-31 | $2.70B |
| 2023-12-31 | $2.56B |
| 2023-09-30 | $2.26B |
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.