IRM vs. SPY
IRM (Iron Mountain Incorporated) is a stock, while SPY (State Street SPDR S&P 500 ETF) is S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, IRM returned 17.96%/yr vs 15.07%/yr for SPY. Their 0.42 correlation means their historical movements had little consistent relationship.
Performance
IRM vs. SPY - Performance Comparison
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Returns By Period
In the year-to-date period, IRM achieves a 49.68% return, which is significantly higher than SPY's 10.13% return. Over the past 10 years, IRM has outperformed SPY with an annualized return of 17.96%, while SPY has yielded a comparatively lower 15.07% annualized return.
IRM
- 1D
- -1.86%
- 1M
- 4.40%
- 6M
- 34.77%
- YTD
- 49.68%
- 1Y
- 34.38%
- 3Y*
- 29.76%
- 5Y*
- 27.70%
- 10Y*
- 17.96%
- ALL TIME*
- 16.53%
SPY
- 1D
- 0.72%
- 1M
- 0.30%
- 6M
- 8.53%
- YTD
- 10.13%
- 1Y
- 21.49%
- 3Y*
- 19.32%
- 5Y*
- 12.76%
- 10Y*
- 15.07%
- ALL TIME*
- 10.79%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $225.69M | $257.91M | $215.42M | |
| $37.27B | $35.99B | $39.23B |
IRM vs. SPY - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
IRM Iron Mountain Incorporated | 49.68% | -18.24% | 54.48% | 46.52% | -0.08% | 87.74% | 0.98% | 5.87% | -7.97% | 23.56% |
SPY State Street SPDR S&P 500 ETF | 10.13% | 17.72% | 24.89% | 26.18% | -18.18% | 28.73% | 18.33% | 31.22% | -4.57% | 21.71% |
Correlation
The correlation between IRM and SPY is 0.39, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.39 |
Correlation (3Y) Balances recent behavior with more history. | 0.48 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.53 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.46 |
Correlation (All Time) Calculated using the full available price history since Feb 1, 1996 | 0.42 |
The correlation between IRM and SPY shifts across timeframes, from 0.39 (1 year) to 0.53 (5 years), reflecting how their relationship changes across market environments.
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Return for Risk
IRM vs. SPY — Risk / Return Rank
IRM
SPY
IRM vs. SPY - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Iron Mountain Incorporated (IRM) and State Street SPDR S&P 500 ETF (SPY). 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.
| IRM | SPY | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.62 | ||
| Sortino ratioReturn per unit of downside risk | -0.70 | ||
| Omega ratioGain probability vs. loss probability | 1.18 | 1.27 | -0.10 |
| Calmar ratioReturn relative to maximum drawdown | 1.20 | 2.20 | -1.01 |
| Martin ratioReturn relative to average drawdown | 3.05 | 9.40 | -6.35 |
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Drawdowns
IRM vs. SPY - Drawdown Comparison
The maximum IRM drawdown since its inception was -55.71%, roughly equal to the maximum SPY drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for IRM and SPY.
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Drawdown Indicators
| IRM | SPY | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -55.71% | -55.19% | -0.52% |
Max Drawdown (1Y)Largest decline over 1 year | -25.15% | -8.88% | -16.27% |
Max Drawdown (3Y)Largest decline over 3 years | -39.03% | -18.76% | -20.27% |
Max Drawdown (5Y)Largest decline over 5 years | -39.03% | -24.50% | -14.53% |
Max Drawdown (10Y)Largest decline over 10 years | -39.03% | -33.72% | -5.31% |
Current DrawdownCurrent decline from peak | -8.07% | -1.40% | -6.67% |
Average DrawdownAverage peak-to-trough decline | -13.13% | -9.01% | -4.12% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 9.91% | 2.08% | +7.83% |
Volatility
IRM vs. SPY - Volatility Comparison
Iron Mountain Incorporated (IRM) has a higher volatility of 9.17% compared to State Street SPDR S&P 500 ETF (SPY) at 3.58%. This indicates that IRM's price experiences larger fluctuations and is considered to be riskier than SPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IRM | SPY | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 9.17% | 3.58% | +5.59% |
Volatility (6M)Calculated over the trailing 6-month period | 24.67% | 10.14% | +14.53% |
Volatility (1Y)Calculated over the trailing 1-year period | 33.33% | 12.89% | +20.44% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 29.93% | 17.18% | +12.75% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 29.80% | 17.95% | +11.85% |
Dividends
IRM vs. SPY - Dividend Comparison
IRM's dividend yield for the trailing twelve months is around 2.76%, more than SPY's 1.01% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IRM Iron Mountain Incorporated | 2.76% | 3.88% | 2.60% | 3.63% | 4.96% | 4.73% | 8.39% | 7.69% | 7.32% | 5.93% | 6.17% | 7.07% |
SPY State Street SPDR S&P 500 ETF | 1.01% | 1.07% | 1.21% | 1.40% | 1.65% | 1.20% | 1.52% | 1.75% | 2.04% | 1.80% | 2.03% | 2.06% |
Frequently Asked Questions
IRM and SPY have a correlation of 0.39, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IRM has higher volatility (9.17%) compared to SPY (3.58%). In terms of maximum drawdown, IRM dropped -55.71% vs SPY's -55.19%.
SPY currently has the higher Sharpe Ratio (1.52 vs 0.90), 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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