# STXU Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, STXU missed two times STX's daily return by 29.6 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.

## STXU daily tracking

Over the 90 days to Nov 4, 2026, STXU missed two times STX's daily return by 29.6 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) | 7.0 | −5.3 | 1.08% | −4.4 (10 days) | −6.1 (10 days) | +1.7 | Not significant (t 0.6) |
| 30 days to Nov 4, 2026, 22 daily returns | closing price | 22.8 | −5.9 | 4.83% | −12.7 (10 days) | −0.3 (12 days) | −12.4 | Not significant (t −0.9) |
| 90 days to Nov 4, 2026: 21 of 63 days, from Sep 11, 2026 | NAV | 7.4 | −5.7 | 1.09% | −4.4 (10 days) | −6.8 (11 days) | +2.4 | Not significant (t 0.8) |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 29.6 | −5.0 | 5.90% | −8.1 (32 days) | −1.8 (31 days) | −6.3 | Not significant (t −0.7) |

### STXU's largest daily misses

The 5 days STXU 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 | STX moved | Target | STXU returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Aug 21, 2026 | closing price | −0.03% | −0.06% | −0.97% | −0.91 pts |
| 2 | Aug 11, 2026 | closing price | +2.44% | +4.88% | +4.05% | −0.83 pts |
| 3 | Aug 7, 2026 | closing price | −4.71% | −9.42% | −8.60% | +0.82 pts |
| 4 | Sep 22, 2026 | closing price | +4.85% | +9.69% | +8.94% | −0.75 pts |
| 5 | Sep 9, 2026 | closing price | −2.04% | −4.08% | −3.43% | +0.65 pts |

### Method

The daily miss is STXU's return each day less two times STX'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 21 of the 63 sessions. STXU ranks 278 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether STX 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 STXU 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, STXU daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/stxu/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/stxu/tracking/