VMCIX vs. THPMX
VMCIX (Vanguard Mid-Cap Index Fund Institutional Shares) and THPMX (Thompson MidCap Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, VMCIX returned 11.49%/yr vs 11.14%/yr for THPMX. Their correlation of 0.93 means they have usually moved in the same direction. VMCIX charges 0.03%/yr vs 1.15%/yr for THPMX.
Performance
VMCIX vs. THPMX - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, VMCIX achieves a 12.34% return, which is significantly lower than THPMX's 15.89% return. Both investments have delivered pretty close results over the past 10 years, with VMCIX having a 11.49% annualized return and THPMX not far behind at 11.14%.
VMCIX
- 1D
- -0.08%
- 1M
- 0.48%
- 6M
- 9.55%
- YTD
- 12.34%
- 1Y
- 16.47%
- 3Y*
- 14.30%
- 5Y*
- 7.76%
- 10Y*
- 11.49%
- ALL TIME*
- 10.22%
THPMX
- 1D
- -0.70%
- 1M
- -0.35%
- 6M
- 11.93%
- YTD
- 15.89%
- 1Y
- 33.96%
- 3Y*
- 15.05%
- 5Y*
- 9.16%
- 10Y*
- 11.14%
- ALL TIME*
- 13.03%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
THPMX Thompson MidCap Fund | $0.00 | $0.00 | $0.00 |
| $0.00 | $0.00 | $0.00 |
VMCIX vs. THPMX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VMCIX Vanguard Mid-Cap Index Fund Institutional Shares | 12.34% | 11.67% | 14.68% | 16.54% | -18.70% | 24.53% | 18.20% | 31.04% | -9.25% | 19.30% |
THPMX Thompson MidCap Fund | 15.89% | 20.08% | 7.70% | 17.01% | -14.84% | 29.71% | 11.97% | 33.48% | -21.90% | 17.10% |
Correlation
The correlation between VMCIX and THPMX is 0.85, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.85 |
Correlation (3Y) Balances recent behavior with more history. | 0.89 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.91 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.90 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2009 | 0.93 |
The correlation between VMCIX and THPMX has been stable across timeframes, ranging from 0.85 to 0.93 - a consistent structural relationship.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
VMCIX vs. THPMX — Risk / Return Rank
VMCIX
THPMX
VMCIX vs. THPMX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Mid-Cap Index Fund Institutional Shares (VMCIX) and Thompson MidCap Fund (THPMX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| VMCIX | THPMX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.88 | ||
| Sortino ratioReturn per unit of downside risk | -1.21 | ||
| Omega ratioGain probability vs. loss probability | 1.21 | 1.36 | -0.15 |
| Calmar ratioReturn relative to maximum drawdown | 1.85 | 3.22 | -1.37 |
| Martin ratioReturn relative to average drawdown | 7.04 | 11.86 | -4.81 |
Loading charts...
Drawdowns
VMCIX vs. THPMX - Drawdown Comparison
The maximum VMCIX drawdown since its inception was -58.86%, which is greater than THPMX's maximum drawdown of -47.55%. Use the drawdown chart below to compare losses from any high point for VMCIX and THPMX.
Loading charts...
Drawdown Indicators
| VMCIX | THPMX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -58.86% | -47.55% | -11.31% |
Max Drawdown (1Y)Largest decline over 1 year | -8.13% | -9.90% | +1.77% |
Max Drawdown (3Y)Largest decline over 3 years | -18.93% | -21.52% | +2.59% |
Max Drawdown (5Y)Largest decline over 5 years | -27.54% | -25.29% | -2.25% |
Max Drawdown (10Y)Largest decline over 10 years | -39.30% | -47.55% | +8.25% |
Current DrawdownCurrent decline from peak | -0.52% | -2.12% | +1.60% |
Average DrawdownAverage peak-to-trough decline | -7.93% | -6.71% | -1.22% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.13% | 2.68% | -0.55% |
Volatility
VMCIX vs. THPMX - Volatility Comparison
The current volatility for Vanguard Mid-Cap Index Fund Institutional Shares (VMCIX) is 2.08%, while Thompson MidCap Fund (THPMX) has a volatility of 3.97%. This indicates that VMCIX experiences smaller price fluctuations and is considered to be less risky than THPMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| VMCIX | THPMX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 2.08% | 3.97% | -1.89% |
Volatility (6M)Calculated over the trailing 6-month period | 9.49% | 11.38% | -1.89% |
Volatility (1Y)Calculated over the trailing 1-year period | 12.59% | 15.36% | -2.77% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.63% | 20.47% | -2.84% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.84% | 22.65% | -3.81% |
VMCIX vs. THPMX - Expense Ratio Comparison
VMCIX has a 0.03% expense ratio, which is lower than THPMX's 1.15% expense ratio.
Dividends
VMCIX vs. THPMX - Dividend Comparison
VMCIX's dividend yield for the trailing twelve months is around 1.32%, less than THPMX's 8.18% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
THPMX Thompson MidCap Fund | 8.18% | 9.48% | 8.04% | 7.60% | 12.04% | 9.76% | 0.33% | 2.93% | 7.29% | 7.51% | 4.84% | 9.46% |
VMCIX Vanguard Mid-Cap Index Fund Institutional Shares | 1.32% | 1.52% | 1.49% | 1.51% | 1.60% | 1.12% | 1.45% | 1.48% | 1.83% | 1.36% | 1.46% | 1.48% |
Frequently Asked Questions
VMCIX and THPMX have a correlation of 0.85, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
THPMX has higher volatility (3.97%) compared to VMCIX (2.08%). In terms of maximum drawdown, VMCIX dropped -58.86% vs THPMX's -47.55%.
THPMX currently has the higher Sharpe Ratio (2.08 vs 1.19), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
Find the right allocation for VMCIX and THPMX
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer