# CIEX Tracking Error: Up vs Down Days

> Over the 90 days to Nov 4, 2026, CIEX missed two times CIEN's daily return by 54.1 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.

## CIEX daily tracking

Over the 90 days to Nov 4, 2026, CIEX missed two times CIEN's daily return by 54.1 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) | 41.9 | −2.8 | 8.24% | +21.9 (9 days) | −19.9 (13 days) | +41.8 | Not enough days |
| 90 days to Nov 4, 2026, 63 daily returns | closing price (stated) | 54.1 | −4.0 | 11.20% | +9.9 (30 days) | −16.5 (33 days) | +26.4 | Not significant (t 1.5) |

### CIEX's largest daily misses

The 5 days CIEX strayed furthest from its daily target in the 90 days to Nov 4, 2026, each on its NAV where ETFIQ holds it, else its closing price.

| # | Day | Read on | CIEN moved | Target | CIEX returned | Miss |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Sep 3, 2026 | closing price | −10.36% | −20.73% | −22.59% | −1.86 pts |
| 2 | Sep 4, 2026 | closing price | +1.12% | +2.23% | +4.04% | +1.81 pts |
| 3 | Oct 5, 2026 | closing price | −0.42% | −0.84% | −2.54% | −1.69 pts |
| 4 | Aug 18, 2026 | closing price | −8.90% | −17.81% | −19.37% | −1.57 pts |
| 5 | Aug 20, 2026 | closing price | −1.75% | −3.50% | −1.97% | +1.53 pts |

### Method

The daily miss is CIEX's return each day less two times CIEN'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. CIEX ranks 447 of 494 2x leveraged ETFs on its 90-day average daily miss. Up days and down days split the miss by whether CIEN 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 CIEX 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

---

Source: ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.
Cite: ETFIQ, CIEX daily tracking, listed by window, data as of Nov 4, 2026. https://etfiq.com/funds/ciex/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/ciex/tracking/