# OSSL Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, OSSL missed two times OSS's daily return by 78.6 basis points a day on average, on its closing price.

Data as of Nov 4, 2026. Rebuilt every trading night.

As of Nov 4, 2026 . Rebuilt every trading night.

## OSSL daily tracking

Over the 90 days to Nov 4, 2026, OSSL missed two times OSS's daily return by 78.6 basis points a day on average, on its closing price.

| Window | Read on | Average daily miss, bp | Signed average, bp | Tracking error | Up days, bp | Down days, bp | Up less down, bp | Confidence |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 30 days to Nov 4, 2026: 20 of 22 days, from Oct 7, 2026 | NAV (stated) | 23.3 | −15.8 | 3.31% | −17.9 (7 days) | −14.8 (12 days) | −3.1 | Not enough days |
| 30 days to Nov 4, 2026, 22 daily returns | closing price | 117.9 | −11.2 | 34.48% | −101.8 (8 days) | +29.3 (13 days) | −131.0 | Not enough days |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 78.6 | −17.5 | 22.03% | −64.3 (22 days) | +7.1 (39 days) | −71.3 | Not significant (t −1.8) |

### OSSL's largest daily misses

The 5 days OSSL strayed furthest from its daily target in the 90 days to Nov 4, 2026, each on its NAV where ETFIQ holds it, else its closing price.

| # | Day | Read on | OSS moved | Target | OSSL returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Sep 11, 2026 | closing price | +3.14% | +6.29% | +4.07% | −2.21 pts |
| 2 | Aug 31, 2026 | closing price | +0.10% | +0.19% | −1.42% | −1.61 pts |
| 3 | Aug 21, 2026 | closing price | 0.00% | 0.00% | −1.53% | −1.53 pts |
| 4 | Aug 25, 2026 | closing price | +0.63% | +1.27% | +0.10% | −1.16 pts |
| 5 | Aug 19, 2026 | closing price | −4.50% | −8.99% | −7.97% | +1.02 pts |

### Method

The daily miss is OSSL's return each day less two times OSS's return that day. A basis point is a hundredth of a percentage point. Each window is read twice where ETFIQ holds both NAVs: on NAVs, and on closing prices. It is stated on the closing price because NAVs for 20 of the 63 sessions. OSSL ranks 484 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether OSS rose or fell; Significant means the gap is at least two standard errors from zero. The average miss carries its sign: a negative one is what the fund kept below its target each day, its fees and financing among it. Not every fund here has traded for a year, and a number over eight months does not order against one over twelve. This page lists each fund with its window and dates instead of ranking them. It becomes a ranking on the night four of them share a full year. Every window ETFIQ can measure for OSSL is listed.

### Where to next

### Sources

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A ranking is not a recommendation or an opinion. ETFIQ is an independent publisher, not an adviser. Standards and sources

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Source: ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.
Cite: ETFIQ, OSSL daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/ossl/tracking/
Licence: https://etfiq.com/license/ Data ETFIQ computes is free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.
HTML: https://etfiq.com/funds/ossl/tracking/