QDIBX vs. PREIX

Last updated Jun 4, 2026

QDIBX (Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans) and PREIX (T. Rowe Price Equity Index 500 Fund) are both mutual funds - QDIBX is a Intermediate Core Bond fund managed by T. Rowe Price, while PREIX is a Large Cap Blend Equities fund managed by T. Rowe Price. Over the past 5 years, QDIBX returned 0.19%/yr vs 14.08%/yr for PREIX. At a 0.16 correlation, their price movements are largely independent. QDIBX charges 0.03%/yr vs 0.15%/yr for PREIX.

Performance

QDIBX vs. PREIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans (QDIBX) and T. Rowe Price Equity Index 500 Fund (PREIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, QDIBX achieves a -0.11% return, which is significantly lower than PREIX's 11.61% return.

QDIBX

• 1D: 0.00%
• 1M: 0.22%
• YTD: -0.11%
• 6M: -0.20%
• 1Y: 4.79%
• 3Y*: 4.40%
• 5Y*: 0.19%
• 10Y*: —

PREIX

• 1D: 0.13%
• 1M: 5.78%
• YTD: 11.61%
• 6M: 11.63%
• 1Y: 28.74%
• 3Y*: 22.53%
• 5Y*: 14.08%
• 10Y*: 15.42%

*Multi-year figures are annualized to reflect compound growth (CAGR)

QDIBX vs. PREIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
QDIBX Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans	-0.11%	7.72%	1.66%	6.71%	-14.11%	-0.17%	6.77%	-0.10%
PREIX T. Rowe Price Equity Index 500 Fund	11.61%	17.66%	24.78%	26.07%	-18.27%	28.48%	18.17%	2.01%

Correlation

The correlation between QDIBX and PREIX is 0.21, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.21
Correlation (3Y) Calculated over the trailing 3-year period	0.19
Correlation (5Y) Calculated over the trailing 5-year period	0.14
Correlation (All Time) Calculated using the full available price history since Dec 16, 2019	0.16

Return for Risk

QDIBX vs. PREIX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

QDIBX

QDIBX Risk / Return Rank: 19
QDIBX Sharpe Ratio Rank: 19
QDIBX Sortino Ratio Rank: 20
QDIBX Omega Ratio Rank: 19
QDIBX Calmar Ratio Rank: 20
QDIBX Martin Ratio Rank: 18

PREIX

PREIX Risk / Return Rank: 72
PREIX Sharpe Ratio Rank: 74
PREIX Sortino Ratio Rank: 66
PREIX Omega Ratio Rank: 66
PREIX Calmar Ratio Rank: 73
PREIX Martin Ratio Rank: 82

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

QDIBX vs. PREIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans (QDIBX) and T. Rowe Price Equity Index 500 Fund (PREIX). 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.

	QDIBX	PREIX	Difference
Sharpe ratio: Return per unit of total volatility	1.26	2.50	-1.24
Sortino ratio: Return per unit of downside risk	1.88	3.40	-1.51
Omega ratio: Gain probability vs. loss probability	1.23	1.45	-0.23
Calmar ratio: Return relative to maximum drawdown	1.62	3.32	-1.70
Martin ratio: Return relative to average drawdown	4.93	15.47	-10.54
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

QDIBX vs. PREIX - Sharpe Ratio Comparison

The current QDIBX Sharpe Ratio is 1.26, which is lower than the PREIX Sharpe Ratio of 2.50. The chart below compares the historical Sharpe Ratios of QDIBX and PREIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	QDIBX	PREIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.26	2.50	-1.24
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.03	0.83	-0.80
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.85	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.16	0.61	-0.45

Drawdowns

QDIBX vs. PREIX - Drawdown Comparison

The maximum QDIBX drawdown since its inception was -19.63%, smaller than the maximum PREIX drawdown of -55.32%. Use the drawdown chart below to compare losses from any high point for QDIBX and PREIX.

Drawdown Indicators

	QDIBX	PREIX	Difference
Max Drawdown Largest peak-to-trough decline	-19.63%	-55.32%	+35.69%
Max Drawdown (1Y) Largest decline over 1 year	-2.97%	-8.93%	+5.96%
Max Drawdown (3Y) Largest decline over 3 years	-5.37%	-18.78%	+13.41%
Max Drawdown (5Y) Largest decline over 5 years	-19.63%	-24.60%	+4.97%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.81%	—
Current Drawdown Current decline from peak	-1.87%	0.00%	-1.87%
Average Drawdown Average peak-to-trough decline	-6.39%	-8.73%	+2.34%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.97%	1.91%	-0.94%

Volatility

QDIBX vs. PREIX - Volatility Comparison

The current volatility for Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans (QDIBX) is 1.32%, while T. Rowe Price Equity Index 500 Fund (PREIX) has a volatility of 2.83%. This indicates that QDIBX experiences smaller price fluctuations and is considered to be less risky than PREIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	QDIBX	PREIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.32%	2.83%	-1.51%
Volatility (6M) Calculated over the trailing 6-month period	2.62%	8.98%	-6.36%
Volatility (1Y) Calculated over the trailing 1-year period	3.82%	11.87%	-8.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.59%	17.00%	-10.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.26%	18.11%	-11.85%

QDIBX vs. PREIX - Expense Ratio Comparison

QDIBX has a 0.03% expense ratio, which is lower than PREIX's 0.15% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

QDIBX vs. PREIX - Dividend Comparison

QDIBX's dividend yield for the trailing twelve months is around 3.50%, more than PREIX's 2.10% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PREIX T. Rowe Price Equity Index 500 Fund	2.10%	2.32%	1.17%	1.32%	1.50%	1.56%	1.97%	2.13%	2.60%	1.30%	2.03%	2.02%
QDIBX Fisher Investments Institutional Group Fixed Income Fund for Retirement Plans	3.50%	3.50%	3.55%	3.65%	2.51%	1.80%	3.25%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both QDIBX and PREIX in my portfolio?

QDIBX and PREIX have a correlation of 0.21, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, QDIBX or PREIX?

PREIX has higher volatility (2.83%) compared to QDIBX (1.32%). In terms of maximum drawdown, QDIBX dropped -19.63% vs PREIX's -55.32%.

Which has better risk-adjusted returns?

PREIX currently has the higher Sharpe Ratio (2.50 vs 1.26), 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.