SPXSY vs. RIO
SPXSY (Spirax-Sarco Engineering PLC) and RIO (Rio Tinto Group) are both stocks. SPXSY operates in Specialty Industrial Machinery (Industrials), while RIO operates in Other Industrial Metals & Mining (Basic Materials). Over the past 5 years, SPXSY returned -11.72%/yr vs 10.17%/yr for RIO. Their 0.16 correlation means their historical movements had little consistent relationship.
Performance
SPXSY vs. RIO - Performance Comparison
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Returns By Period
In the year-to-date period, SPXSY achieves a 6.31% return, which is significantly lower than RIO's 24.40% return.
SPXSY
- 1D
- 0.19%
- 1M
- 5.96%
- 6M
- -1.86%
- YTD
- 6.31%
- 1Y
- 18.26%
- 3Y*
- -10.69%
- 5Y*
- -11.72%
- 10Y*
- —
- ALL TIME*
- 10.88%
RIO
- 1D
- -0.34%
- 1M
- 2.57%
- 6M
- 9.37%
- YTD
- 24.40%
- 1Y
- 70.95%
- 3Y*
- 21.12%
- 5Y*
- 10.17%
- 10Y*
- 19.32%
- ALL TIME*
- 11.96%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $267.36M | $271.65M | $273.47M | |
| $405.41K | $535.17K | $404.18K |
SPXSY vs. RIO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
SPXSY Spirax-Sarco Engineering PLC | 6.31% | 9.14% | -35.47% | 7.18% | -42.06% | 98.57% | 2.19% | 41.14% | 79.09% |
RIO Rio Tinto Group | 24.40% | 44.47% | -15.36% | 11.06% | 18.48% | -3.67% | 36.22% | 33.18% | -9.14% |
Correlation
The correlation between SPXSY and RIO is 0.31, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.31 |
Correlation (3Y) Balances recent behavior with more history. | 0.31 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.22 |
Correlation (All Time) Calculated using the full available price history since Feb 28, 2018 | 0.16 |
The correlation between SPXSY and RIO shifts across timeframes, from 0.16 (all time) to 0.31 (1 year), reflecting how their relationship changes across market environments.
Fundamentals
SPXSY:
$7.07B
RIO:
$157.38B
SPXSY:
£2.40
RIO:
$13.62
SPXSY:
14.84
RIO:
7.11
SPXSY:
1.56
RIO:
1.37
SPXSY:
4.30
RIO:
2.43
SPXSY:
£3.36B
RIO:
$115.63B
SPXSY:
£1.59B
RIO:
$30.71B
SPXSY:
£767.18M
RIO:
$41.85B
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Return for Risk
SPXSY vs. RIO — Risk / Return Rank
SPXSY
RIO
SPXSY vs. RIO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Spirax-Sarco Engineering PLC (SPXSY) and Rio Tinto Group (RIO). 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.
| SPXSY | RIO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.92 | ||
| Sortino ratioReturn per unit of downside risk | -1.97 | ||
| Omega ratioGain probability vs. loss probability | 1.12 | 1.38 | -0.27 |
| Calmar ratioReturn relative to maximum drawdown | 0.82 | 3.42 | -2.61 |
| Martin ratioReturn relative to average drawdown | 1.81 | 10.06 | -8.25 |
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Drawdowns
SPXSY vs. RIO - Drawdown Comparison
The maximum SPXSY drawdown since its inception was -67.73%, smaller than the maximum RIO drawdown of -88.97%. Use the drawdown chart below to compare losses from any high point for SPXSY and RIO.
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Drawdown Indicators
| SPXSY | RIO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -67.73% | -88.97% | +21.24% |
Max Drawdown (1Y)Largest decline over 1 year | -20.46% | -20.74% | +0.28% |
Max Drawdown (3Y)Largest decline over 3 years | -49.65% | -24.19% | -25.46% |
Max Drawdown (5Y)Largest decline over 5 years | -67.73% | -35.25% | -32.48% |
Max Drawdown (10Y)Largest decline over 10 years | — | -37.47% | — |
Current DrawdownCurrent decline from peak | -54.34% | -13.56% | -40.78% |
Average DrawdownAverage peak-to-trough decline | -35.69% | -23.73% | -11.96% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 9.22% | 7.04% | +2.18% |
Volatility
SPXSY vs. RIO - Volatility Comparison
The current volatility for Spirax-Sarco Engineering PLC (SPXSY) is 8.03%, while Rio Tinto Group (RIO) has a volatility of 8.60%. This indicates that SPXSY experiences smaller price fluctuations and is considered to be less risky than RIO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SPXSY | RIO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 8.03% | 8.60% | -0.57% |
Volatility (6M)Calculated over the trailing 6-month period | 24.02% | 24.65% | -0.63% |
Volatility (1Y)Calculated over the trailing 1-year period | 33.44% | 29.29% | +4.15% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 38.58% | 29.17% | +9.41% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 55.49% | 30.42% | +25.07% |
Dividends
SPXSY vs. RIO - Dividend Comparison
SPXSY's dividend yield for the trailing twelve months is around 2.38%, less than RIO's 4.15% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
RIO Rio Tinto Group | 4.15% | 4.66% | 7.40% | 5.40% | 10.48% | 10.23% | 5.13% | 7.68% | 6.32% | 4.47% | 3.93% | 7.58% |
SPXSY Spirax-Sarco Engineering PLC | 2.38% | 2.38% | 2.40% | 1.39% | 1.39% | 0.75% | 0.34% | 0.35% | 0.00% | 0.00% | 0.00% | 0.00% |
Financials
SPXSY vs. RIO - Financials Comparison
This section allows you to compare key financial metrics between Spirax-Sarco Engineering PLC and Rio Tinto Group. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
SPXSY vs. RIO - Profitability Comparison
SPXSY - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Spirax-Sarco Engineering PLC reported a gross profit of 162.89M and revenue of 875.27M. Therefore, the gross margin over that period was 18.6%.
RIO - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Rio Tinto Group reported a gross profit of 8.70B and revenue of 31.02B. Therefore, the gross margin over that period was 28.0%.
SPXSY - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Spirax-Sarco Engineering PLC reported an operating income of 162.89M and revenue of 875.27M, resulting in an operating margin of 18.6%.
RIO - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Rio Tinto Group reported an operating income of 8.70B and revenue of 31.02B, resulting in an operating margin of 28.0%.
SPXSY - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Spirax-Sarco Engineering PLC reported a net income of 100.08M and revenue of 875.27M, resulting in a net margin of 11.4%.
RIO - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Rio Tinto Group reported a net income of 6.66B and revenue of 31.02B, resulting in a net margin of 21.5%.
Frequently Asked Questions
SPXSY and RIO have a correlation of 0.31, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
RIO has higher volatility (8.60%) compared to SPXSY (8.03%). In terms of maximum drawdown, SPXSY dropped -67.73% vs RIO's -88.97%.
RIO currently has the higher Sharpe Ratio (2.42 vs 0.50), 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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