REW vs ROM: which held to its multiple?

Over three months against its own daily promise, REW finished 2.1 points over and ROM 1.6 points short. ProShares UltraShort Technology and ProShares Ultra Technology.

−12.8%
REW returned, 3 months
+8.0%
ROM returned, 3 months
−1.7 pts
REW from its stated multiple
−3.2 pts
ROM from its stated multiple
REW · 3 months to Sep 30, 20261.7 pts short of its stated multiple
1.7 pts short of its stated multipleREW returned −12.8% while −2 times XLK's move would have been −11.2%XLK +5.6% ×−2 implies−11.2%REW returned−12.8%1.7 pts short of its stated multipleREW returned −12.8% while −2 times XLK's move would have been −11.2%XLK +5.6% ×−2 implies−11.2%REW returned−12.8%

REW returned −12.8% while −2 times XLK's move would have been −11.2%

ROM · 3 months to Sep 30, 20263.2 pts short of its stated multiple
3.2 pts short of its stated multipleROM returned +8.0% while 2 times XLK's move would have been +11.2%XLK +5.6% ×2 implies+11.2%ROM returned+8.0%3.2 pts short of its stated multipleROM returned +8.0% while 2 times XLK's move would have been +11.2%XLK +5.6% ×2 implies+11.2%ROM returned+8.0%

ROM returned +8.0% while 2 times XLK's move would have been +11.2%

ETFIQ Decay Resistance Score · ROM scores higherDid it keep up with its own daily multiple, compounded day by day?

REW among the 125 inverse ETFs over three months

REW 67.6
0.4, the lowest in this set99.6, the highest

ROM among the 470 leveraged ETFs, long, over three months

ROM 83.4
0.1, the lowest in this set99.9, the highest

A percentile among the 125 inverse ETFs over three months. ROM 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 returnMultiple would giveDifference
WindowREWROMREWROMREWROM
1 month−9.5%+9.7%−10.2%+10.2%+0.7 pts−0.4 pts
3 months−12.8%+8.0%−11.2%+11.2%−1.7 pts−3.2 pts
6 months−56.3%+97.0%−90.9%+90.9%+34.5 pts+6.1 pts
1 year−54.3%+71.9%−79.2%+79.2%+24.9 pts−7.3 pts
3 years−86.7%+308.5%not meaningfulnot meaningfulnot meaningfulnot meaningful
Since launch
REW Jan 2010 · ROM Jan 2010
−100.0%+9405.0%not meaningfulnot meaningfulnot meaningfulnot meaningful

REW and ROM over each window. Every figure is an ETFIQ calculation with distributions reinvested. Source: ETFIQ. Open the live comparison on ETFIQ →

On the same fields

REW
ProShares UltraShort Technology · Aims to return twice the opposite of the daily move of technology (XLK)
ROM
ProShares Ultra Technology · Aims to return twice the daily move of technology (XLK)
Issuer ProShares ProShares
Sets out to return -2x +2x
Underlying asset XLK XLK
Segment sector sector
Fund returned, 3 months or since launch −12.8% +8.0%
Underlying returned, over that window +5.6% +5.6%
What the stated multiple implies, over that window −11.2% +11.2%
Difference from stated, over that window −1.7 pts −3.2 pts
Fund returned, 1 year or since launch −54.3% +71.9%
Difference from stated, over that window +24.9 pts −7.3 pts
Underlying volatility 26% 26%
Difference over the days both have traded no shared window −3.2 pts
Expense ratio 0.95% 0.93%
Launched Jan 4, 2010 Jan 4, 2010
Net assets $4m $1.4bn

REW and ROM on the same fields, as of Sep 30, 2026. Source: ETFIQ.

REW in plain words

Three months to Sep 30, 2026: REW returned −12.8% where its own daily promise gave −15.0%, 2.1 points over. Read the multiple against the whole window instead and −2 times XLK's 5.6% implies −11.2%, which makes REW look 1.7 points short. 3.8 of that is daily compounding, which happens to any −2 times fund over the same path, and the rest is the fund. REW aims to return -2 times XLK's move each day, then resets. Over one day it does that. Over longer, the daily results compound, so the total is not -2 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. XLK moved at 26% 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.

ROM in plain words

Three months to Sep 30, 2026: ROM returned +8.0% where its own daily promise gave +9.6%, 1.6 points short. Read the multiple against the whole window instead and 2 times XLK's 5.6% implies +11.2%, which makes ROM look 3.2 points short. 1.6 of that is daily compounding, which happens to any 2 times fund over the same path, and the rest is the fund. ROM aims to return +2 times XLK's move each day, then resets. Over longer, the daily results compound, so the total is not +2 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, REW or ROM?
Over the window to Sep 30, 2026, REW finished 1.7 points from what its multiple implies and ROM finished 3.2 points from its own, so REW came closer. Neither figure predicts the next window: it depends on how much the underlying moves about.
Are REW and ROM levered on the same thing?
Yes. Both are levered on technology, REW at -2 times and ROM at +2 times the daily move.
Which one decays faster, REW or ROM?
Decay follows how much the underlying moves about. Over this window REW’s moved at 26% annualized and ROM’s at 26%, so REW has the rougher ride and, at the same multiple, loses more to compounding.
Can I hold REW or ROM 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.
Which is cheaper, REW or ROM?
REW charges 0.95% a year and ROM charges 0.93%, so ROM is cheaper. Fees come from each fund's prospectus.
Cite this page

ETFIQ, REW against ROM, data as of Sep 30, 2026. https://etfiq.com/compare/leverage/rew-vs-rom

Open data

Free to use with attribution. Every figure is calculated from a named public source; the method is at etfiq.com/methodology.