MYY vs UMDD: which held to its multiple?
Over three months against its own daily promise, MYY finished 1.6 points over and UMDD 1.6 points short. ProShares Short MidCap400 and ProShares UltraPro MidCap400.
MYY returned +7.1% while −1 times MDY's move would have been +5.6%
UMDD returned −18.2% while 3 times MDY's move would have been −16.7%
MYY among the 125 inverse ETFs over three months
UMDD among the 470 leveraged ETFs, long, over three months
A percentile among the 125 inverse ETFs over three months. UMDD is a percentile among the 470 leveraged ETFs, long, over three months, a different set, so the two marks are not on one scale. It is a position in a set, not a rating, and neither end of it is a recommendation. All leveraged ETFs ranked by it → How it is computed →
Performance, window by window
| Total return | Multiple would give | Difference | ||||
|---|---|---|---|---|---|---|
| Window | MYY | UMDD | MYY | UMDD | MYY | UMDD |
| 1 month | +4.7% | −12.9% | +4.2% | −12.6% | +0.5 pts | −0.3 pts |
| 3 months | +7.1% | −18.2% | +5.6% | −16.7% | +1.6 pts | −1.5 pts |
| 6 months | −4.0% | +11.4% | −6.1% | +18.4% | +2.1 pts | −7.0 pts |
| 1 year | −6.9% | +17.9% | −11.4% | +34.2% | +4.5 pts | −16.3 pts |
| 3 years | −24.4% | +79.0% | −49.0% | +146.9% | +24.6 pts | −68.0 pts |
| Since launch MYY Jan 2010 · UMDD Feb 2010 | −89.0% | +1401.8% | not meaningful | not meaningful | not meaningful | not meaningful |
MYY and UMDD over each window. Every figure is an ETFIQ calculation with distributions reinvested. Source: ETFIQ. Open the live comparison on ETFIQ →
On the same fields
MYY and UMDD on the same fields, as of Sep 30, 2026. Source: ETFIQ.
MYY in plain words
Three months to Sep 30, 2026: MYY returned +7.1% where its own daily promise gave +5.5%, 1.6 points over. Read the multiple against the whole window instead and −1 times MDY's −5.6% implies +5.6%, which makes MYY look 1.6 points over. 0.0 of that is daily compounding, which happens to any −1 times fund over the same path, and the rest is the fund. MYY aims to return -1 times MDY's move each day, then resets. Over one day it does that. Over longer, the daily results compound, so the total is not -1 times the period's move: in a market that falls and comes back it is reliably less, and in a steady run it can be more. MDY moved at 12% annualized over that window. That is what decides how far the two figures separate: the same fund on a calm underlying and a violent one is a different product.
UMDD in plain words
Three months to Sep 30, 2026: UMDD returned −18.2% where its own daily promise gave −16.6%, 1.6 points short. Read the multiple against the whole window instead and 3 times MDY's −5.6% implies −16.7%, which makes UMDD look 1.5 points short. 0.1 of that is daily compounding, which happens to any 3 times fund over the same path, and the rest is the fund. UMDD aims to return +3 times MDY's move each day, then resets. Over longer, the daily results compound, so the total is not +3 times the period's move: in a market that falls and comes back it is reliably less, and in a steady run it can be more.
Questions people ask
- Which came closer to its stated multiple, MYY or UMDD?
- Over the window to Sep 30, 2026, MYY finished 1.6 points from what its multiple implies and UMDD finished 1.5 points from its own, so UMDD came closer. Neither figure predicts the next window: it depends on how much the underlying moves about.
- Are MYY and UMDD levered on the same thing?
- Yes. Both are levered on the S&P MidCap 400, MYY at -1 times and UMDD at +3 times the daily move.
- Which one decays faster, MYY or UMDD?
- Decay follows how much the underlying moves about. Over this window MYY’s moved at 12% annualized and UMDD’s at 12%, so MYY has the rougher ride and, at the same multiple, loses more to compounding.
- Can I hold MYY or UMDD for a year?
- Both reset every day, so the multiple in the name applies to a single day and the daily results compound. Over a year the total is not the multiple times the year’s move, and in a market that falls and comes back it is reliably less. ETFIQ makes no recommendation either way.
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement. A comparison is not a recommendation.
ETFIQ, MYY against UMDD, data as of Sep 30, 2026. https://etfiq.com/compare/leverage/myy-vs-umdd
Free to use with attribution. Every figure is calculated from a named public source; the method is at etfiq.com/methodology.
Cite this page. ETFIQ, MYY against UMDD, data as of Sep 30, 2026. https://etfiq.com/compare/leverage/myy-vs-umdd Free to use with attribution; the underlying files are at Open data.
Other forms
- Plain
- ETFIQ, MYY against UMDD, data as of Sep 30, 2026. https://etfiq.com/compare/leverage/myy-vs-umdd
- APA
- ETFIQ. (Sep 30, 2026). MYY against UMDD. Retrieved from https://etfiq.com/compare/leverage/myy-vs-umdd
- Markdown
- [MYY against UMDD (ETFIQ, Sep 30, 2026)](https://etfiq.com/compare/leverage/myy-vs-umdd)