# IBX Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, IBX missed two times IBM's daily return by 13.2 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.

## IBX daily tracking

Over the 90 days to Nov 4, 2026, IBX missed two times IBM's daily return by 13.2 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) | 14.2 | −4.8 | 3.35% | −8.8 (12 days) | +0.1 (10 days) | −9.0 | Not significant (t −1.1) |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 13.2 | −4.1 | 2.80% | −2.8 (31 days) | −5.3 (32 days) | +2.5 | Not significant (t 0.6) |
| 180 days to Nov 4, 2026, 124 daily returns | closing price (stated) | 23.5 | −4.6 | 7.00% | −5.7 (64 days) | −3.4 (60 days) | −2.3 | Not significant (t −0.3) |

### IBX's largest daily misses

The 5 days IBX 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 | IBM moved | Target | IBX returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | May 21, 2026 | closing price | +12.43% | +24.86% | +27.62% | +2.76 pts |
| 2 | May 22, 2026 | closing price | +0.34% | +0.69% | −1.43% | −2.12 pts |
| 3 | May 18, 2026 | closing price | +1.57% | +3.15% | +1.66% | −1.48 pts |
| 4 | May 19, 2026 | closing price | −0.19% | −0.38% | +1.02% | +1.40 pts |
| 5 | May 13, 2026 | closing price | −2.09% | −4.18% | −5.42% | −1.24 pts |

### Method

The daily miss is IBX's return each day less two times IBM'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. IBX ranks 58 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether IBM 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 IBX 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, IBX daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/ibx/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/ibx/tracking/