# QBTZ Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, QBTZ missed minus two times QBTS's daily return by 50.3 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.

## QBTZ daily tracking

Over the 90 days to Nov 4, 2026, QBTZ missed minus two times QBTS's daily return by 50.3 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) | 13.7 | −13.7 | 0.96% | −12.8 (6 days) | −14.1 (14 days) | +1.3 | Not enough days |
| 30 days to Nov 4, 2026, 22 daily returns | closing price | 48.0 | −12.9 | 8.79% | −41.0 (8 days) | +3.2 (14 days) | −44.1 | Not enough days |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 50.3 | −28.9 | 18.08% | −21.1 (25 days) | −34.1 (38 days) | +13.0 | Not significant (t 0.5) |
| 180 days to Nov 4, 2026, 124 daily returns | closing price (stated) | 47.3 | −27.8 | 14.80% | −24.9 (51 days) | −29.8 (73 days) | +4.9 | Not significant (t 0.3) |
| 1 year to Nov 4, 2026, 251 daily returns | closing price (stated) | 40.4 | −19.9 | 11.55% | −17.0 (113 days) | −22.4 (138 days) | +5.4 | Not significant (t 0.6) |

### QBTZ's largest daily misses

The 5 days QBTZ strayed furthest from its daily target in the 1 year to Nov 4, 2026, each on its NAV where ETFIQ holds it, else its closing price.

| # | Day | Read on | QBTS moved | Target | QBTZ returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Sep 9, 2026 | closing price | −3.11% | +6.23% | −2.31% | −8.54 pts |
| 2 | Jul 6, 2026 | closing price | +0.13% | −0.27% | −2.86% | −2.59 pts |
| 3 | Jul 2, 2026 | closing price | −4.13% | +8.26% | +5.79% | −2.46 pts |
| 4 | May 22, 2026 | closing price | +14.22% | −28.44% | −30.36% | −1.92 pts |
| 5 | Jul 7, 2026 | closing price | −6.65% | +13.30% | +11.52% | −1.78 pts |

### Method

The daily miss is QBTZ's return each day less minus two times QBTS'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. QBTZ ranks 70 of 75 2x inverse ETFs on its 90-day average daily miss. Up days and down days split the miss by whether QBTS 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 QBTZ is listed.

### Where to next

### Sources

Links are sources, not endorsements.

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, QBTZ daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/qbtz/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/qbtz/tracking/