REW vs. KORU
REW (ProShares UltraShort Technology) and KORU (Direxion Daily South Korea Bull 3X Shares) are both Leveraged Equities funds - REW tracks the Dow Jones U.S. Technology Index (-200%) while KORU tracks the MSCI Korea 25-50 Index. Both are passively managed. Over the past 10 years, REW returned -45.33%/yr vs 17.17%/yr for KORU. At a correlation of -0.55, they often move in opposite directions. REW charges 0.95%/yr vs 1.29%/yr for KORU.
Performance
REW vs. KORU - Performance Comparison
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Returns By Period
In the year-to-date period, REW achieves a -43.64% return, which is significantly lower than KORU's 356.66% return. Over the past 10 years, REW has underperformed KORU with an annualized return of -45.33%, while KORU has yielded a comparatively higher 17.17% annualized return.
REW
- 1D
- -2.01%
- 1M
- -2.83%
- YTD
- -43.64%
- 6M
- -41.62%
- 1Y
- -57.85%
- 3Y*
- -45.39%
- 5Y*
- -37.94%
- 10Y*
- -45.33%
KORU
- 1D
- 11.85%
- 1M
- -18.31%
- YTD
- 356.66%
- 6M
- 393.86%
- 1Y
- 905.39%
- 3Y*
- 110.38%
- 5Y*
- 14.71%
- 10Y*
- 17.17%
REW vs. KORU - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
REW ProShares UltraShort Technology | -43.64% | -43.15% | -33.70% | -61.35% | 65.72% | -53.61% | -71.34% | -56.83% | -10.02% | -49.11% |
KORU Direxion Daily South Korea Bull 3X Shares | 356.66% | 432.73% | -62.18% | 28.61% | -70.16% | -33.86% | 48.78% | 5.47% | -59.89% | 167.08% |
Correlation
The correlation between REW and KORU is -0.69, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | -0.69 |
Correlation (3Y) Calculated over the trailing 3-year period | -0.61 |
Correlation (5Y) Calculated over the trailing 5-year period | -0.60 |
Correlation (10Y) Calculated over the trailing 10-year period | -0.58 |
Correlation (All Time) Calculated using the full available price history since Apr 10, 2013 | -0.55 |
The correlation between REW and KORU shifts across timeframes, from -0.69 (1 year) to -0.55 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
REW vs. KORU — Risk / Return Rank
REW
KORU
REW vs. KORU - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for ProShares UltraShort Technology (REW) and Direxion Daily South Korea Bull 3X Shares (KORU). 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.
| REW | KORU | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -7.58 | ||
| Sortino ratioReturn per unit of downside risk | -5.81 | ||
| Omega ratioGain probability vs. loss probability | 0.77 | 1.53 | -0.77 |
| Calmar ratioReturn relative to maximum drawdown | -0.94 | 14.90 | -15.84 |
| Martin ratioReturn relative to average drawdown | -2.00 | 43.11 | -45.11 |
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Drawdowns
REW vs. KORU - Drawdown Comparison
The maximum REW drawdown since its inception was -99.99%, roughly equal to the maximum KORU drawdown of -95.79%. Use the drawdown chart below to compare losses from any high point for REW and KORU.
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Drawdown Indicators
| REW | KORU | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -99.99% | -95.79% | -4.20% |
Max Drawdown (1Y)Largest decline over 1 year | -61.83% | -61.39% | -0.44% |
Max Drawdown (3Y)Largest decline over 3 years | -86.76% | -73.34% | -13.42% |
Max Drawdown (5Y)Largest decline over 5 years | -93.62% | -93.34% | -0.28% |
Max Drawdown (10Y)Largest decline over 10 years | -99.78% | -95.79% | -3.99% |
Current DrawdownCurrent decline from peak | -99.99% | -34.45% | -65.54% |
Average DrawdownAverage peak-to-trough decline | -86.90% | -57.40% | -29.50% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 29.52% | 21.18% | +8.34% |
Volatility
REW vs. KORU - Volatility Comparison
The current volatility for ProShares UltraShort Technology (REW) is 24.33%, while Direxion Daily South Korea Bull 3X Shares (KORU) has a volatility of 88.86%. This indicates that REW experiences smaller price fluctuations and is considered to be less risky than KORU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| REW | KORU | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 24.33% | 88.86% | -64.53% |
Volatility (6M)Calculated over the trailing 6-month period | 39.77% | 139.03% | -99.26% |
Volatility (1Y)Calculated over the trailing 1-year period | 47.39% | 144.03% | -96.64% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 52.56% | 91.57% | -39.01% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 49.29% | 83.10% | -33.81% |
REW vs. KORU - Expense Ratio Comparison
REW has a 0.95% expense ratio, which is lower than KORU's 1.29% expense ratio.
Dividends
REW vs. KORU - Dividend Comparison
REW's dividend yield for the trailing twelve months is around 8.84%, more than KORU's 0.19% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
KORU Direxion Daily South Korea Bull 3X Shares | 0.19% | 0.89% | 4.10% | 2.55% | 0.48% | 0.76% | 0.01% | 0.93% | 1.40% | 3.59% |
REW ProShares UltraShort Technology | 8.84% | 6.69% | 5.68% | 5.97% | 0.65% | 0.00% | 0.27% | 1.80% | 0.51% | 0.00% |
Frequently Asked Questions
REW and KORU have a correlation of -0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
KORU has higher volatility (88.86%) compared to REW (24.33%). In terms of maximum drawdown, REW dropped -99.99% vs KORU's -95.79%.
On 10-year performance, KORU leads with 17.17% vs -45.33% for REW. On fees, REW is cheaper at 0.95% per year. On volatility, REW has been the lower-risk option at 24.33%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, KORU has performed better with a 17.17% return vs -45.33%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
REW is cheaper with a 0.95% expense ratio, compared with 1.29% for KORU.
REW has the higher dividend yield at 8.84%, compared with 0.19% for KORU.
REW tracks Dow Jones U.S. Technology Index (-200%), while KORU tracks MSCI Korea 25-50 Index. They also come from different issuers: ProShares and Direxion. Their fees differ too: 0.95% for REW and 1.29% for KORU.
KORU currently has the higher Sharpe Ratio (6.35 vs -1.22), 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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