# SOUX Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, SOUX missed two times SOUN's daily return by 38.8 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.

## SOUX daily tracking

Over the 90 days to Nov 4, 2026, SOUX missed two times SOUN's daily return by 38.8 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) | 18.6 | −16.7 | 2.33% | −21.1 (5 days) | −15.2 (15 days) | −6.0 | Not enough days |
| 30 days to Nov 4, 2026, 22 daily returns | closing price | 50.5 | −19.1 | 9.59% | −21.5 (6 days) | −18.3 (16 days) | −3.3 | Not enough days |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 38.8 | −16.3 | 7.35% | −18.0 (21 days) | −15.4 (41 days) | −2.6 | Not significant (t −0.2) |
| 180 days to Nov 4, 2026, 124 daily returns | closing price (stated) | 40.3 | −16.1 | 7.63% | −19.1 (43 days) | −14.6 (79 days) | −4.5 | Not significant (t −0.5) |
| 1 year to Nov 4, 2026, 251 daily returns | closing price (stated) | 39.9 | −15.8 | 7.83% | −11.2 (93 days) | −17.7 (154 days) | +6.5 | Not significant (t 1.0) |

### SOUX's largest daily misses

The 5 days SOUX 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 | SOUN moved | Target | SOUX returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Jun 11, 2026 | closing price | +3.70% | +7.41% | +5.81% | −1.59 pts |
| 2 | May 8, 2026 | closing price | −7.79% | −15.58% | −17.10% | −1.52 pts |
| 3 | May 1, 2026 | closing price | +20.10% | +40.20% | +38.69% | −1.51 pts |
| 4 | Jun 24, 2026 | closing price | −1.55% | −3.11% | −4.42% | −1.32 pts |
| 5 | Feb 26, 2026 | closing price | +5.40% | +10.80% | +12.07% | +1.27 pts |

### Method

The daily miss is SOUX's return each day less two times SOUN'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. SOUX ranks 360 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether SOUN 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 SOUX 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, SOUX daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/soux/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/soux/tracking/