# LABU Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, LABU missed three times S&P Biotech's daily return by 15.6 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.

## LABU daily tracking

Over the 90 days to Nov 4, 2026, LABU missed three times S&P Biotech's daily return by 15.6 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: 17 of 22 days, from Oct 7, 2026 | NAV | 4.0 | −4.0 | 0.50% | −2.8 (7 days) | −4.9 (10 days) | +2.1 | Not enough days |
| 30 days to Nov 4, 2026, 22 daily returns | closing price (stated) | 15.5 | −5.7 | 3.31% | −5.5 (10 days) | −5.9 (12 days) | +0.4 | Not significant (t 0.0) |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 15.6 | −3.8 | 3.17% | −5.3 (33 days) | −2.2 (30 days) | −3.2 | Not significant (t −0.6) |
| 180 days to Nov 4, 2026, 124 daily returns | closing price (stated) | 16.2 | −4.0 | 3.15% | −6.3 (71 days) | −0.8 (53 days) | −5.6 | Not significant (t −1.6) |
| 1 year to Nov 4, 2026, 251 daily returns | closing price (stated) | 16.2 | −4.2 | 3.21% | −7.2 (138 days) | −0.7 (113 days) | −6.5 | Significant (t −2.6) |

### LABU's largest daily misses

The 5 days LABU 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 | S&P Biotech moved | Target | LABU returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Feb 17, 2026 | closing price | +1.44% | +4.32% | +3.59% | −0.73 pts |
| 2 | Nov 5, 2025 | closing price | +1.08% | +3.25% | +2.58% | −0.67 pts |
| 3 | Feb 25, 2026 | closing price | −0.68% | −2.04% | −1.41% | +0.63 pts |
| 4 | Sep 11, 2026 | closing price | −0.40% | −1.19% | −1.77% | −0.58 pts |
| 5 | Feb 23, 2026 | closing price | +1.76% | +5.27% | +4.71% | −0.55 pts |

### Method

The daily miss is LABU's return each day less three times S&P Biotech'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 17 of the 63 sessions. LABU ranks 21 of 31 3x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether S&P Biotech 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. S&P Biotech is itself an ETF, so its own fee and tracking are inside the miss. 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 LABU 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, LABU daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/labu/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/labu/tracking/