# QUBX Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, QUBX missed two times QUBT's daily return by 39.5 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.

## QUBX daily tracking

Over the 90 days to Nov 4, 2026, QUBX missed two times QUBT's daily return by 39.5 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, 22 daily returns | closing price (stated) | 39.5 | −8.9 | 8.97% | −22.3 (7 days) | −5.9 (14 days) | −16.5 | Not enough days |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 39.5 | −9.1 | 8.41% | −18.2 (26 days) | −0.6 (35 days) | −17.6 | Not significant (t −1.4) |
| 180 days to Nov 4, 2026, 124 daily returns | closing price (stated) | 50.5 | −10.0 | 11.99% | −25.1 (54 days) | +2.8 (68 days) | −27.9 | Not significant (t −1.9) |
| 1 year to Nov 4, 2026, 251 daily returns | closing price (stated) | 57.7 | −11.2 | 12.59% | −29.7 (115 days) | +5.0 (134 days) | −34.8 | Significant (t −3.4) |

### QUBX's largest daily misses

The 5 days QUBX 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 | QUBT moved | Target | QUBX returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | May 21, 2026 | closing price | +19.35% | +38.70% | +43.49% | +4.78 pts |
| 2 | Nov 11, 2025 | closing price | −5.98% | −11.97% | −9.24% | +2.73 pts |
| 3 | May 20, 2026 | closing price | +3.69% | +7.38% | +4.78% | −2.59 pts |
| 4 | Apr 2, 2026 | closing price | +3.46% | +6.93% | +4.58% | −2.34 pts |
| 5 | Jan 16, 2026 | closing price | +4.27% | +8.54% | +6.37% | −2.17 pts |

### Method

The daily miss is QUBX's return each day less two times QUBT'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 its NAV or its target's is not struck at the 4:00 p.m. close. QUBX ranks 367 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether QUBT 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 QUBX 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, QUBX daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/qubx/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/qubx/tracking/