# MULL Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, MULL missed two times MU's daily return by 19.0 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.

## MULL daily tracking

Over the 90 days to Nov 4, 2026, MULL missed two times MU's daily return by 19.0 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: 11 of 22 days, from Oct 16, 2026 | NAV | 9.0 | −9.0 | 0.64% | −7.2 (5 days) | −10.6 (6 days) | +3.4 | Not enough days |
| 30 days to Nov 4, 2026, 22 daily returns | closing price (stated) | 13.3 | −8.6 | 2.21% | −11.0 (9 days) | −7.0 (13 days) | −4.0 | Not enough days |
| 90 days to Nov 4, 2026: 12 of 63 days, from Sep 11, 2026 | NAV | 9.6 | −9.6 | 0.70% | −7.2 (5 days) | −11.4 (7 days) | +4.2 | Not enough days |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 19.0 | −9.2 | 4.23% | −12.9 (32 days) | −5.4 (31 days) | −7.6 | Not significant (t −1.1) |
| 180 days to Nov 4, 2026, 124 daily returns | closing price (stated) | 23.1 | −8.3 | 4.97% | −5.8 (63 days) | −10.8 (61 days) | +5.0 | Not significant (t 0.9) |
| 1 year to Nov 4, 2026, 251 daily returns | closing price (stated) | 20.8 | −7.5 | 4.38% | −5.6 (132 days) | −9.6 (119 days) | +4.0 | Not significant (t 1.1) |

### MULL's largest daily misses

The 5 days MULL 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 | MU moved | Target | MULL returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Jun 26, 2026 | closing price | −6.69% | −13.39% | −14.47% | −1.08 pts |
| 2 | Aug 27, 2026 | closing price | −0.32% | −0.64% | −1.70% | −1.06 pts |
| 3 | Aug 28, 2026 | closing price | −0.27% | −0.54% | +0.44% | +0.99 pts |
| 4 | May 20, 2026 | closing price | +4.76% | +9.52% | +10.34% | +0.83 pts |
| 5 | May 21, 2026 | closing price | +4.11% | +8.23% | +7.43% | −0.79 pts |

### Method

The daily miss is MULL's return each day less two times MU'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 12 of the 63 sessions. MULL ranks 154 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether MU 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 MULL 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, MULL daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/mull/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/mull/tracking/