# ACLZ Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, ACLZ missed two times ACLS's daily return by 37.0 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.

## ACLZ daily tracking

Over the 90 days to Nov 4, 2026, ACLZ missed two times ACLS's daily return by 37.0 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) | 6.5 | −2.6 | 1.35% | −9.0 (9 days) | +2.7 (11 days) | −11.7 | Not enough days |
| 30 days to Nov 4, 2026, 22 daily returns | closing price | 32.2 | −5.1 | 6.14% | −7.0 (9 days) | −3.8 (13 days) | −3.2 | Not enough days |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 37.0 | −6.0 | 7.61% | −15.5 (32 days) | +3.7 (31 days) | −19.2 | Not significant (t −1.6) |

### ACLZ's largest daily misses

The 5 days ACLZ 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 | ACLS moved | Target | ACLZ returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Sep 4, 2026 | closing price | +4.27% | +8.53% | +7.01% | −1.53 pts |
| 2 | Sep 29, 2026 | closing price | +3.77% | +7.55% | +6.34% | −1.21 pts |
| 3 | Sep 16, 2026 | closing price | −1.23% | −2.46% | −1.46% | +0.99 pts |
| 4 | Sep 28, 2026 | closing price | +0.73% | +1.46% | +2.31% | +0.85 pts |
| 5 | Aug 7, 2026 | closing price | +2.64% | +5.28% | +4.52% | −0.77 pts |

### Method

The daily miss is ACLZ's return each day less two times ACLS'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. ACLZ ranks 345 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether ACLS 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 ACLZ 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, ACLZ daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/aclz/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/aclz/tracking/