TTIRX vs. LTSTX

Last updated Jun 27, 2026

TTIRX (Nuveen Lifecycle Index 2055 Fund Retirement Class) and LTSTX (Principal LifeTime 2025 Fund) are both Target Retirement Date funds. Over the past 10 years, TTIRX returned 12.41%/yr vs 8.38%/yr for LTSTX. With a 0.96 correlation, they move nearly in lockstep. TTIRX charges 0.35%/yr vs 0.01%/yr for LTSTX.

Performance

TTIRX vs. LTSTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nuveen Lifecycle Index 2055 Fund Retirement Class (TTIRX) and Principal LifeTime 2025 Fund (LTSTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TTIRX achieves a 9.77% return, which is significantly higher than LTSTX's 4.19% return. Over the past 10 years, TTIRX has outperformed LTSTX with an annualized return of 12.41%, while LTSTX has yielded a comparatively lower 8.38% annualized return.

TTIRX

• 1D: 0.31%
• 1M: -0.79%
• YTD: 9.77%
• 6M: 8.89%
• 1Y: 21.82%
• 3Y*: 18.48%
• 5Y*: 9.56%
• 10Y*: 12.41%

LTSTX

• 1D: 0.09%
• 1M: -0.17%
• YTD: 4.19%
• 6M: 3.61%
• 1Y: 10.53%
• 3Y*: 11.76%
• 5Y*: 5.24%
• 10Y*: 8.38%

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

TTIRX vs. LTSTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TTIRX Nuveen Lifecycle Index 2055 Fund Retirement Class	9.77%	20.66%	15.08%	20.42%	-17.80%	17.09%	16.94%	25.99%	-7.36%	19.39%
LTSTX Principal LifeTime 2025 Fund	4.19%	12.16%	11.91%	13.30%	-15.23%	10.91%	13.70%	20.50%	-6.41%	16.75%

Correlation

The correlation between TTIRX and LTSTX is 0.95, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Apr 29, 2011	0.96

The correlation between TTIRX and LTSTX has been stable across timeframes, ranging from 0.93 to 0.96 - a consistent structural relationship.

Return for Risk

TTIRX vs. LTSTX — Risk / Return Rank

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

TTIRX

TTIRX Risk / Return Rank: 60
TTIRX Sharpe Ratio Rank: 59
TTIRX Sortino Ratio Rank: 55
TTIRX Omega Ratio Rank: 57
TTIRX Calmar Ratio Rank: 60
TTIRX Martin Ratio Rank: 69

LTSTX

LTSTX Risk / Return Rank: 45
LTSTX Sharpe Ratio Rank: 43
LTSTX Sortino Ratio Rank: 42
LTSTX Omega Ratio Rank: 45
LTSTX Calmar Ratio Rank: 42
LTSTX Martin Ratio Rank: 54

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.

TTIRX vs. LTSTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nuveen Lifecycle Index 2055 Fund Retirement Class (TTIRX) and Principal LifeTime 2025 Fund (LTSTX). 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.

	TTIRX	LTSTX	Difference
Sharpe ratio: Return per unit of total volatility	1.87	1.58	+0.28
Sortino ratio: Return per unit of downside risk	2.57	2.26	+0.31
Omega ratio: Gain probability vs. loss probability	1.34	1.30	+0.04
Calmar ratio: Return relative to maximum drawdown	2.58	2.13	+0.46
Martin ratio: Return relative to average drawdown	11.12	9.38	+1.75

TTIRX vs. LTSTX - Sharpe Ratio Comparison

The current TTIRX Sharpe Ratio is 1.87, which is comparable to the LTSTX Sharpe Ratio of 1.58. The chart below compares the historical Sharpe Ratios of TTIRX and LTSTX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

TTIRX vs. LTSTX - Drawdown Comparison

The maximum TTIRX drawdown since its inception was -31.81%, smaller than the maximum LTSTX drawdown of -48.17%. Use the drawdown chart below to compare losses from any high point for TTIRX and LTSTX.

Drawdown Indicators

	TTIRX	LTSTX	Difference
Max Drawdown Largest peak-to-trough decline	-31.81%	-48.17%	+16.36%
Max Drawdown (1Y) Largest decline over 1 year	-8.92%	-5.24%	-3.68%
Max Drawdown (3Y) Largest decline over 3 years	-15.14%	-8.12%	-7.02%
Max Drawdown (5Y) Largest decline over 5 years	-25.65%	-21.01%	-4.64%
Max Drawdown (10Y) Largest decline over 10 years	-31.81%	-23.33%	-8.48%
Current Drawdown Current decline from peak	-2.10%	-0.95%	-1.15%
Average Drawdown Average peak-to-trough decline	-4.37%	-6.14%	+1.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.06%	1.19%	+0.87%

Volatility

TTIRX vs. LTSTX - Volatility Comparison

Nuveen Lifecycle Index 2055 Fund Retirement Class (TTIRX) has a higher volatility of 5.12% compared to Principal LifeTime 2025 Fund (LTSTX) at 2.80%. This indicates that TTIRX's price experiences larger fluctuations and is considered to be riskier than LTSTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TTIRX	LTSTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.12%	2.80%	+2.32%
Volatility (6M) Calculated over the trailing 6-month period	10.27%	5.91%	+4.36%
Volatility (1Y) Calculated over the trailing 1-year period	12.35%	7.04%	+5.31%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.79%	9.24%	+5.55%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.72%	9.79%	+5.93%

TTIRX vs. LTSTX - Expense Ratio Comparison

TTIRX has a 0.35% expense ratio, which is higher than LTSTX's 0.01% expense ratio.

Dividends

TTIRX vs. LTSTX - Dividend Comparison

TTIRX's dividend yield for the trailing twelve months is around 2.31%, less than LTSTX's 11.70% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
LTSTX Principal LifeTime 2025 Fund	11.70%	12.19%	9.74%	4.26%	8.00%	7.66%	5.25%	6.91%	6.39%	4.75%	3.65%	8.91%
TTIRX Nuveen Lifecycle Index 2055 Fund Retirement Class	2.31%	2.53%	1.97%	1.93%	2.05%	1.80%	1.47%	2.02%	2.38%	0.11%	2.21%	0.29%

Frequently Asked Questions

Can I hold both TTIRX and LTSTX in my portfolio?

With a correlation of 0.95, TTIRX and LTSTX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, TTIRX or LTSTX?

TTIRX has higher volatility (5.12%) compared to LTSTX (2.80%). In terms of maximum drawdown, TTIRX dropped -31.81% vs LTSTX's -48.17%.

Which has better risk-adjusted returns?

TTIRX currently has the higher Sharpe Ratio (1.87 vs 1.58), 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.