REW vs. KORU
REW (ProShares UltraShort Technology) and KORU (Direxion Daily MSCI South Korea Bull 3X Shares) are both exchange-traded funds - REW is a Leveraged Equities fund tracking the Dow Jones U.S. Technology Index (-200%), while KORU is a South Korea Equities fund tracking the MSCI Korea 25/50 Index. Both are passively managed. Over the past 10 years, REW returned -43.85%/yr vs 4.90%/yr for KORU. At a correlation of -0.55, they often move in opposite directions. REW charges 0.95%/yr vs 1.32%/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 -39.78% return, which is significantly lower than KORU's 105.44% return. Over the past 10 years, REW has underperformed KORU with an annualized return of -43.85%, while KORU has yielded a comparatively higher 4.90% annualized return.
REW
- 1D
- 4.43%
- 1M
- 8.43%
- 6M
- -38.44%
- YTD
- -39.78%
- 1Y
- -51.65%
- 3Y*
- -41.91%
- 5Y*
- -36.52%
- 10Y*
- -43.85%
KORU
- 1D
- -14.72%
- 1M
- -59.41%
- 6M
- 40.56%
- YTD
- 105.44%
- 1Y
- 347.48%
- 3Y*
- 53.48%
- 5Y*
- -0.18%
- 10Y*
- 4.90%
REW vs. KORU - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
REW ProShares UltraShort Technology | -39.78% | -43.15% | -33.70% | -61.35% | 65.72% | -53.61% | -71.34% | -56.83% | -10.02% | -49.11% |
KORU Direxion Daily MSCI South Korea Bull 3X Shares | 105.44% | 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 -0.71, 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 | -0.72 |
Correlation (3Y) Calculated over the trailing 3-year period | -0.62 |
Correlation (5Y) Calculated over the trailing 5-year period | -0.61 |
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 -0.71 (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 MSCI 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 | -3.35 | ||
| Sortino ratioReturn per unit of downside risk | -4.35 | ||
| Omega ratioGain probability vs. loss probability | 0.82 | 1.37 | -0.56 |
| Calmar ratioReturn relative to maximum drawdown | -0.86 | 4.97 | -5.83 |
| Martin ratioReturn relative to average drawdown | -1.75 | 14.03 | -15.78 |
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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 | -60.10% | -70.51% | +10.41% |
Max Drawdown (3Y)Largest decline over 3 years | -86.76% | -73.34% | -13.42% |
Max Drawdown (5Y)Largest decline over 5 years | -93.62% | -92.74% | -0.88% |
Max Drawdown (10Y)Largest decline over 10 years | -99.74% | -95.79% | -3.95% |
Current DrawdownCurrent decline from peak | -99.99% | -70.51% | -29.48% |
Average DrawdownAverage peak-to-trough decline | -86.94% | -57.39% | -29.55% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 29.45% | 24.92% | +4.53% |
Volatility
REW vs. KORU - Volatility Comparison
The current volatility for ProShares UltraShort Technology (REW) is 19.92%, while Direxion Daily MSCI South Korea Bull 3X Shares (KORU) has a volatility of 70.60%. 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 | 19.92% | 70.60% | -50.68% |
Volatility (6M)Calculated over the trailing 6-month period | 42.41% | 147.53% | -105.12% |
Volatility (1Y)Calculated over the trailing 1-year period | 49.67% | 151.62% | -101.95% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 52.97% | 94.03% | -41.06% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 49.45% | 84.35% | -34.90% |
REW vs. KORU - Expense Ratio Comparison
REW has a 0.95% expense ratio, which is lower than KORU's 1.32% expense ratio.
Dividends
REW vs. KORU - Dividend Comparison
REW's dividend yield for the trailing twelve months is around 8.27%, more than KORU's 0.42% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
KORU Direxion Daily MSCI South Korea Bull 3X Shares | 0.42% | 0.89% | 4.10% | 2.55% | 0.48% | 0.76% | 0.01% | 0.93% | 1.40% | 3.59% |
REW ProShares UltraShort Technology | 8.27% | 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 -0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
KORU has higher volatility (70.60%) compared to REW (19.92%). In terms of maximum drawdown, REW dropped -99.99% vs KORU's -95.79%.
On 10-year performance, KORU leads with 4.90% vs -43.85% for REW. On fees, REW is cheaper at 0.95% per year. On volatility, REW has been the lower-risk option at 19.92%. 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 4.90% return vs -43.85%. 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 1.32% for KORU.
REW has the higher dividend yield at 8.27%, compared with 0.42% for KORU.
REW is categorized as Leveraged Equities, while KORU is South Korea Equities. 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 1.32% for KORU.
KORU currently has the higher Sharpe Ratio (2.31 vs -1.04), 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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