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TDTT vs. VOO
Performance
Return for Risk
Drawdowns
Volatility
Dividends

TDTT vs. VOO

Last updated Jun 4, 2026

TDTT (FlexShares iBoxx 3-Year Target Duration TIPS Index Fund) and VOO (Vanguard S&P 500 ETF) are both exchange-traded funds - TDTT is a Inflation-Protected Bonds fund tracking the iBoxx 3-Year Target Duration TIPS, while VOO is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 10 years, TDTT returned 3.11%/yr vs 15.56%/yr for VOO. At a 0.06 correlation, their price movements are largely independent. TDTT charges 0.18%/yr vs 0.03%/yr for VOO.

Performance

TDTT vs. VOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT) and Vanguard S&P 500 ETF (VOO). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, TDTT achieves a 1.81% return, which is significantly lower than VOO's 10.91% return. Over the past 10 years, TDTT has underperformed VOO with an annualized return of 3.11%, while VOO has yielded a comparatively higher 15.56% annualized return.

TDTT

1D
0.00%
1M
-0.06%
YTD
1.81%
6M
1.77%
1Y
4.65%
3Y*
5.00%
5Y*
2.85%
10Y*
3.11%

VOO

1D
-0.70%
1M
5.04%
YTD
10.91%
6M
10.93%
1Y
28.04%
3Y*
22.44%
5Y*
13.90%
10Y*
15.56%
*Multi-year figures are annualized to reflect compound growth (CAGR)

TDTT vs. VOO - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
TDTT
FlexShares iBoxx 3-Year Target Duration TIPS Index Fund		1.81%6.67%3.96%4.40%-4.58%5.49%6.84%5.74%0.25%0.43%
VOO
Vanguard S&P 500 ETF		10.91%17.82%24.98%26.32%-18.17%28.79%18.32%31.37%-4.50%21.77%

Correlation

The correlation between TDTT and VOO is 0.03, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.03

Correlation (3Y)
Calculated over the trailing 3-year period

0.10

Correlation (5Y)
Calculated over the trailing 5-year period

0.14

Correlation (10Y)
Calculated over the trailing 10-year period

0.08

Correlation (All Time)
Calculated using the full available price history since Sep 26, 2011

0.06

The correlation between TDTT and VOO shifts across timeframes, from 0.03 (1 year) to 0.14 (5 years), reflecting how their relationship changes across market environments.

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.

FlexShares iBoxx 3-Year Target Duration TIPS Index Fund

Vanguard S&P 500 ETF

Often compared with TDTT:
TDTT vs. STIPTDTT vs. TLTETDTT vs. SPIPTDTT vs. FLTRTDTT vs. BKLNTDTT vs. IQDFTDTT vs. VTIP
Often compared with VOO:
VOO vs. VTIVOO vs. QQQVOO vs. SCHDVOO vs. VTVOO vs. SPYVOO vs. FXAIXVOO vs. IVV

Return for Risk

TDTT vs. VOO — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
TDTT
TDTT Risk / Return Rank: 8484
Overall Rank
TDTT Sharpe Ratio Rank: 7878
Sharpe Ratio Rank
TDTT Sortino Ratio Rank: 9090
Sortino Ratio Rank
TDTT Omega Ratio Rank: 8484
Omega Ratio Rank
TDTT Calmar Ratio Rank: 8888
Calmar Ratio Rank
TDTT Martin Ratio Rank: 8282
Martin Ratio Rank
VOO
VOO Risk / Return Rank: 7070
Overall Rank
VOO Sharpe Ratio Rank: 7171
Sharpe Ratio Rank
VOO Sortino Ratio Rank: 7070
Sortino Ratio Rank
VOO Omega Ratio Rank: 7070
Omega Ratio Rank
VOO Calmar Ratio Rank: 6262
Calmar Ratio Rank
VOO Martin Ratio Rank: 7575
Martin Ratio Rank
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.

TDTT vs. VOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT) and Vanguard S&P 500 ETF (VOO). 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.

TDTTVOODifference
Sharpe ratioReturn per unit of total volatility
2.54
2.39

+0.15

Sortino ratioReturn per unit of downside risk
4.20
3.25

+0.95

Omega ratioGain probability vs. loss probability

1.51

1.43

+0.08

Calmar ratioReturn relative to maximum drawdown

5.17

3.16

+2.01

Martin ratioReturn relative to average drawdown

16.59

14.73

+1.87

Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TDTT vs. VOO - Sharpe Ratio Comparison

The current TDTT Sharpe Ratio is 2.54, which is comparable to the VOO Sharpe Ratio of 2.39. The chart below compares the historical Sharpe Ratios of TDTT and VOO, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Sharpe Ratios by Period

TDTTVOODifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

2.54

2.39

+0.15

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.78

0.83

-0.05

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.92

0.87

+0.06

Sharpe Ratio (All Time)

Calculated using the full available price history

0.69

0.89

-0.19

Drawdowns

TDTT vs. VOO - Drawdown Comparison

The maximum TDTT drawdown since its inception was -6.97%, smaller than the maximum VOO drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for TDTT and VOO.

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Drawdown Indicators

TDTTVOODifference

Max Drawdown

Largest peak-to-trough decline

-6.97%

-33.99%

+27.02%

Max Drawdown (1Y)

Largest decline over 1 year

-0.90%

-8.90%

+8.00%

Max Drawdown (3Y)

Largest decline over 3 years

-1.53%

-18.69%

+17.16%

Max Drawdown (5Y)

Largest decline over 5 years

-6.97%

-24.52%

+17.55%

Max Drawdown (10Y)

Largest decline over 10 years

-6.97%

-33.99%

+27.02%

Current Drawdown

Current decline from peak

-0.14%

-0.70%

+0.56%

Average Drawdown

Average peak-to-trough decline

-1.60%

-3.69%

+2.09%

Ulcer Index

Depth and duration of drawdowns from previous peaks

0.28%

1.91%

-1.63%

Volatility

TDTT vs. VOO - Volatility Comparison

The current volatility for FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT) is 0.46%, while Vanguard S&P 500 ETF (VOO) has a volatility of 2.84%. This indicates that TDTT experiences smaller price fluctuations and is considered to be less risky than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

TDTTVOODifference

Volatility (1M)

Calculated over the trailing 1-month period

0.46%

2.84%

-2.38%

Volatility (6M)

Calculated over the trailing 6-month period

1.21%

8.90%

-7.69%

Volatility (1Y)

Calculated over the trailing 1-year period

1.85%

11.80%

-9.95%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

3.67%

16.81%

-13.14%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

3.38%

18.01%

-14.63%

TDTT vs. VOO - Expense Ratio Comparison

TDTT has a 0.18% expense ratio, which is higher than VOO's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

TDTT vs. VOO - Dividend Comparison

TDTT's dividend yield for the trailing twelve months is around 4.54%, more than VOO's 1.03% yield.

PositionTTM20252024202320222021202020192018201720162015
TDTT
FlexShares iBoxx 3-Year Target Duration TIPS Index Fund		4.54%4.52%4.01%3.88%6.97%4.53%1.15%1.91%2.48%1.88%1.01%0.00%
VOO
Vanguard S&P 500 ETF		1.03%1.13%1.24%1.46%1.69%1.25%1.54%1.88%2.06%1.78%2.02%2.10%

Frequently Asked Questions

TDTT and VOO have a correlation of 0.03, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

VOO has higher volatility (2.84%) compared to TDTT (0.46%). In terms of maximum drawdown, TDTT dropped -6.97% vs VOO's -33.99%.

On 10-year performance, VOO leads with 15.56% vs 3.11% for TDTT. On fees, VOO is cheaper at 0.03% per year. On volatility, TDTT has been the lower-risk option at 0.46%. The better choice depends on whether you care most about return, fees, risk, or income.

Over the 10-year period, VOO has performed better with a 15.56% return vs 3.11%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

VOO is cheaper with a 0.03% expense ratio, compared with 0.18% for TDTT.

TDTT has the higher dividend yield at 4.54%, compared with 1.03% for VOO.

TDTT is categorized as Inflation-Protected Bonds, while VOO is S&P 500. TDTT tracks iBoxx 3-Year Target Duration TIPS, while VOO tracks S&P 500 Index. They also come from different issuers: Northern Trust and Vanguard. Their fees differ too: 0.18% for TDTT and 0.03% for VOO.

TDTT currently has the higher Sharpe Ratio (2.54 vs 2.39), 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.

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