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RMBC vs RMBX: which held to its multiple?

Over the days both have traded, RMBC finished 7.9 points from its stated multiple and RMBX 9.8. Corgi RMBS 2x Daily ETF and Tradr 2X Long RMBS Daily ETF.

−35.5%
RMBC returned, 3 months
−37.4%
RMBX returned, 3 months
−7.9 pts
RMBC from its stated multiple
−9.8 pts
RMBX from its stated multiple
RMBC · 3 months to Sep 30, 20267.9 pts short of its stated multiple
7.9 pts short of its stated multipleRMBC returned −35.5% while 2 times RMBS's move would have been −27.6%RMBS −13.8% ×2 implies−27.6%RMBC returned−35.5%7.9 pts short of its stated multipleRMBC returned −35.5% while 2 times RMBS's move would have been −27.6%RMBS −13.8% ×2 implies−27.6%RMBC returned−35.5%

RMBC returned −35.5% while 2 times RMBS's move would have been −27.6%

RMBX · 3 months to Sep 30, 20269.8 pts short of its stated multiple
9.8 pts short of its stated multipleRMBX returned −37.4% while 2 times RMBS's move would have been −27.6%RMBS −13.8% ×2 implies−27.6%RMBX returned−37.4%9.8 pts short of its stated multipleRMBX returned −37.4% while 2 times RMBS's move would have been −27.6%RMBS −13.8% ×2 implies−27.6%RMBX returned−37.4%

RMBX returned −37.4% while 2 times RMBS's move would have been −27.6%

ETFIQ Decay Resistance Score · RMBC scores higherDid it keep up with its own daily multiple, compounded day by day?
0.1, the lowest in this set99.9, the highest

A percentile among the 470 leveraged ETFs, long, over three months. 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
WindowRMBCRMBXRMBCRMBXRMBCRMBX
1 month+45.9%+45.3%+46.3%+46.3%−0.4 pts−1.0 pts
3 months−35.5%−37.4%−27.6%−27.6%−7.9 pts−9.8 pts
Since launch
RMBC Jun 2026 · RMBX Jul 2026
−37.3%−37.4%−28.5%−27.6%−8.8 pts−9.8 pts

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

On the same fields

RMBC
Corgi RMBS 2x Daily ETF · Aims to return twice the daily move of Rambus (RMBS)
RMBX
Tradr 2X Long RMBS Daily ETF · Aims to return twice the daily move of Rambus (RMBS)
Issuer Corgi Tradr
Sets out to return +2x +2x
Underlying asset RMBS RMBS
Segment company company
Fund returned, 3 months or since launch −35.5% −37.4%
Underlying returned, over that window −13.8% −13.8%
What the stated multiple implies, over that window −27.6% −27.6%
Difference from stated, over that window −7.9 pts −9.8 pts
Fund returned, 1 year or since launch −37.3% −37.4%
Difference from stated, over that window −8.8 pts −9.8 pts
Underlying volatility 67% 67%
Difference over the days both have traded −7.9 pts −9.8 pts
Expense ratio 0.45% 1.49%
Launched Jun 24, 2026 Jul 1, 2026
Net assets $510,316 $1m

RMBC and RMBX on the same fields, as of Sep 30, 2026. Source: ETFIQ.

RMBC in plain words

Three months to Sep 30, 2026: RMBC returned −35.5% where its own daily promise gave −33.8%, 1.8 points short. Read the multiple against the whole window instead and 2 times RMBS's −13.8% implies −27.6%, which makes RMBC look 7.9 points short. 6.2 of that is daily compounding, which happens to any 2 times fund over the same path, and the rest is the fund. RMBC aims to return +2 times RMBS'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. RMBS moved at 67% 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.

RMBX in plain words

Three months to Sep 30, 2026: RMBX returned −37.4% where its own daily promise gave −33.8%, 3.6 points short. Read the multiple against the whole window instead and 2 times RMBS's −13.8% implies −27.6%, which makes RMBX look 9.8 points short. RMBX aims to return +2 times RMBS's move each day, then resets.

Questions people ask

Which came closer to its stated multiple, RMBC or RMBX?
Over the window to Sep 30, 2026, RMBC finished 7.9 points from what its multiple implies and RMBX finished 9.8 points from its own, so RMBC came closer. Neither figure predicts the next window: it depends on how much the underlying moves about.
Are RMBC and RMBX levered on the same thing?
Yes. Both are levered on Rambus, RMBC at +2 times and RMBX at +2 times the daily move.
Which one decays faster, RMBC or RMBX?
Decay follows how much the underlying moves about. Over this window RMBC’s moved at 67% annualized and RMBX’s at 67%, so RMBC has the rougher ride and, at the same multiple, loses more to compounding.
Can I hold RMBC or RMBX 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, RMBC or RMBX?
RMBC charges 0.45% a year and RMBX charges 1.49%, so RMBC is cheaper. Fees come from each fund's prospectus.
Other comparisons
RMBC on its own →RMBX on its own →How every figure is computed →Standards and sources →
Where these figures came from
RMBC filings on SEC EDGAR ↗RMBC prospectus with the expense ratio (SEC) ↗Corgi website ↗RMBX filings on SEC EDGAR ↗RMBX prospectus with the expense ratio (SEC) ↗Tradr website ↗

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.

Cite this page

ETFIQ, RMBC against RMBX, data as of Sep 30, 2026. https://etfiq.com/compare/leverage/rmbc-vs-rmbx

Open data

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