# XNDX Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, XNDX missed two times XNDU's daily return by 66.0 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.

## XNDX daily tracking

Over the 90 days to Nov 4, 2026, XNDX missed two times XNDU's daily return by 66.0 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, 22 daily returns | closing price (stated) | 103.3 | −20.4 | 19.55% | −61.6 (6 days) | −4.9 (16 days) | −56.6 | Not enough days |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 66.0 | −13.3 | 14.02% | −39.3 (19 days) | −5.9 (43 days) | −33.4 | Not significant (t −1.7) |
| 180 days to Nov 4, 2026: 121 of 124 days, from May 11, 2026 | closing price (stated) | 61.3 | −12.6 | 13.08% | −26.4 (40 days) | −7.9 (80 days) | −18.5 | Not significant (t −1.2) |

### XNDX's largest daily misses

The 5 days XNDX strayed furthest from its daily target in the 180 days to Nov 4, 2026, each on its NAV where ETFIQ holds it, else its closing price.

| # | Day | Read on | XNDU moved | Target | XNDX returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Oct 23, 2026 | closing price | −2.58% | −5.17% | −7.66% | −2.49 pts |
| 2 | Oct 8, 2026 | closing price | −8.24% | −16.48% | −18.52% | −2.04 pts |
| 3 | Oct 12, 2026 | closing price | −10.51% | −21.03% | −19.08% | +1.94 pts |
| 4 | Jul 21, 2026 | closing price | +0.74% | +1.48% | +3.36% | +1.89 pts |
| 5 | Jul 17, 2026 | closing price | −1.87% | −3.73% | −5.56% | −1.82 pts |

### Method

The daily miss is XNDX's return each day less two times XNDU'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. XNDX ranks 470 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether XNDU 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 XNDX 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, XNDX daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/xndx/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/xndx/tracking/