Data as of .
PST vs TBX: which held to its multiple?
Over three months against its own daily promise, PST finished 2.1 points over and TBX 1.5 points over.
ETFIQ Decay Resistance Score: PST scores higher
Did it keep up with its own daily multiple, compounded day by day?
A percentile among the 121 inverse ETFs 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
| Window | Total return | Multiple would give | Difference | |||
|---|---|---|---|---|---|---|
| PST | TBX | PST | TBX | PST | TBX | |
| 1 month | +4.2% | +2.1% | +3.5% | +1.7% | +0.7 pts | +0.4 pts |
| 3 months | +6.9% | +3.8% | +4.7% | +2.4% | +2.1 pts | +1.5 pts |
| 6 months | +10.4% | +5.8% | +5.7% | +2.8% | +4.7 pts | +3.0 pts |
| 1 year | +15.2% | +8.9% | +5.4% | +2.7% | +9.7 pts | +6.1 pts |
| 3 years | +14.1% | +13.0% | −17.5% | −8.8% | +31.6 pts | +21.8 pts |
| Since launch | −47.4% | −12.5% | −99.8% | −38.0% | +52.5 pts | +25.5 pts |
| PST ProShares UltraShort 7-10 Year Treasury Aims to return twice the opposite of the daily move of 10-year Treasuries (IEF) | TBX ProShares Short 7-10 Year Treasury Aims to return 1 times the opposite of the daily move of 10-year Treasuries (IEF) | |
|---|---|---|
| Issuer | ProShares | ProShares |
| Sets out to return | -2x | -1x |
| On | IEF | IEF |
| Segment | bond | bond |
| Fund returned, 3 months | +6.9% | +3.8% |
| Underlying returned, 3 months | −2.4% | −2.4% |
| What the stated multiple implies, 3 months | +4.7% | +2.4% |
| Difference from stated, 3 months | +2.1 pts | +1.5 pts |
| Fund returned, 1 year or since launch | +15.2% | +8.9% |
| Difference from stated, over that window | +9.7 pts | +6.1 pts |
| Underlying volatility | 5% | 5% |
| Expense ratio | 0.95% | not published |
| Launched | Jan 4, 2010 | Apr 5, 2011 |
PST in plain words
Three months to Sep 11, 2026: PST returned +6.9% where its own daily promise gave +4.7%, 2.1 points over. Read the multiple against the whole window instead and −2 times IEF's −2.4% implies +4.7%, which makes PST look 2.1 points over. 0.0 of that is daily compounding, which happens to any −2 times fund over the same path, and the rest is the fund. PST aims to return -2 times IEF'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. IEF moved at 5% 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.
TBX in plain words
Three months to Sep 11, 2026: TBX returned +3.8% where its own daily promise gave +2.4%, 1.5 points over. Read the multiple against the whole window instead and −1 times IEF's −2.4% implies +2.4%, which makes TBX look 1.5 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. TBX aims to return -1 times IEF's move each day, then resets. 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.
Questions people ask
- Which came closer to its stated multiple, PST or TBX?
- Over the window to Sep 11, 2026, PST finished 2.1 points from what its multiple implies and TBX finished 1.5 points from its own, so TBX came closer. Neither figure predicts the next window: it depends on how much the underlying moves about.
- Are PST and TBX levered on the same thing?
- Yes. Both are levered on 10-year Treasuries, PST at -2 times and TBX at -1 times the daily move.
- Which one decays faster, PST or TBX?
- Decay follows how much the underlying moves about. Over this window PST’s moved at 5% annualized and TBX’s at 5%, so PST has the rougher ride and, at the same multiple, loses more to compounding.
- Can I hold PST or TBX 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.
Other comparisons
Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, PST against TBX, data as of Sep 11, 2026. https://etfiq.com/compare/leverage/PST-TBX Free to use with attribution; the underlying files are at Open data.