Options Skew Analytics
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VALE options analytics

VALE · Stock

Data as of 24 September 2026 (end of day)

Some metrics unavailable for this session

VALE options are pricing a 30-day at-the-money volatility of 33.9%, a move of about ±9.7% over the next month. Its history here is 4 sessions, short of the 180 a percentile needs, so this reading is not yet ranked against its own past.

Its 25-delta puts carry 0.43 volatility points more than the calls.

Its next earnings report is 2026-10-29 (estimated from its reporting cadence).

Current readings

30-day ATM implied volatilityⓘ
33.93%

Prices a move of about ±9.7% over 30 days, or ±2.1% on a typical day.

25-delta risk reversalⓘ
+0.43

Puts carry 0.43 volatility points more than calls the same distance from the money.

25-delta butterflyⓘ
+0.37

The wings carry 0.37 volatility points more than at-the-money.

Term structure slopeⓘ
1.032

90-day volatility is 3% above 30-day.

Where 30-day implied volatility sits

Against 4 prior sessions (one-year window)

Not enough history in this window to place the current reading.

IV percentile, 1 year
—
IV rank, 1 year
—
IV percentile, 2 years
—
IV rank, 2 years
—

Rank is the position between the lowest and highest readings in the window, so a single past extreme pins everything after it near one end. Percentile is the share of sessions below the current reading and is unaffected by how far that extreme reached. Both are withheld when the window holds fewer than 180 sessions.

Session detail

Underlying close
$13.56
30-day implied forward
$13.64
60-day ATM IV
35.85%
90-day ATM IV
35.00%
180-day ATM IV
—
Expirations used
7
Total open interest
1,124,232
Put / call open interest
1.04

The forward is derived from put-call parity on the strikes nearest the money, not taken from the underlying close. It is what every moneyness and delta on this page is measured against.

30-day at-the-money implied volatility

Last 4 sessions

32%33%34%35%36%2026-09-21 — 30-day ATM IV 36%2026-09-22 — 30-day ATM IV 32%2026-09-23 — 30-day ATM IV 34%2026-09-24 — 30-day ATM IV 34%21 Sep22 Sep23 Sep24 Sep
Show the underlying numbers (most recent 4)
Session30-day ATM IV25-delta RRTerm slopeClose
2026-09-2433.93%+0.431.032$13.56
2026-09-2334.03%+0.051.031$13.82
2026-09-2232.34%-4.121.086$14.19
2026-09-2135.58%-0.611.004$14.15

The chart covers every session in the archive, 4 in total. The table lists the most recent 4.

25-delta risk reversal

Last 4 sessions

-6.0-4.0-2.00.02.02026-09-21 — 25-delta RR (volatility points) -0.62026-09-22 — 25-delta RR (volatility points) -4.12026-09-23 — 25-delta RR (volatility points) 0.02026-09-24 — 25-delta RR (volatility points) 0.421 Sep22 Sep23 Sep24 Sep

The dashed line marks zero, where the 25-delta put and call carry the same implied volatility.

Skew curve

Implied volatility by delta, front expirations

Implied volatility by delta

15d (2026-10-09) · 22d (2026-10-16) · 29d (2026-10-23)

30%35%40%45%50%2026-10-09 (15d) — 10Δ C — IV 39.83%2026-10-09 (15d) — 15Δ C — IV 37.29%2026-10-09 (15d) — 20Δ C — IV 36.19%2026-10-09 (15d) — 25Δ C — IV 35.53%2026-10-09 (15d) — 30Δ C — IV 35.09%2026-10-09 (15d) — 35Δ C — IV 34.91%2026-10-09 (15d) — 40Δ C — IV 34.91%2026-10-09 (15d) — 45Δ C — IV 34.92%2026-10-09 (15d) — ATM — IV 34.93%2026-10-09 (15d) — 45Δ P — IV 34.95%2026-10-09 (15d) — 40Δ P — IV 34.98%2026-10-09 (15d) — 35Δ P — IV 35.05%2026-10-09 (15d) — 30Δ P — IV 35.16%2026-10-09 (15d) — 25Δ P — IV 35.32%2026-10-09 (15d) — 20Δ P — IV 35.71%2026-10-09 (15d) — 15Δ P — IV 36.64%15d2026-10-16 (22d) — 10Δ C — IV 39.72%2026-10-16 (22d) — 15Δ C — IV 37.05%2026-10-16 (22d) — 20Δ C — IV 35.10%2026-10-16 (22d) — 25Δ C — IV 33.95%2026-10-16 (22d) — 30Δ C — IV 33.90%2026-10-16 (22d) — 35Δ C — IV 33.93%2026-10-16 (22d) — 40Δ C — IV 33.97%2026-10-16 (22d) — 45Δ C — IV 34.36%2026-10-16 (22d) — ATM — IV 35.73%2026-10-16 (22d) — 45Δ P — IV 37.32%2026-10-16 (22d) — 40Δ P — IV 37.89%2026-10-16 (22d) — 35Δ P — IV 37.97%2026-10-16 (22d) — 30Δ P — IV 38.02%2026-10-16 (22d) — 25Δ P — IV 38.00%2026-10-16 (22d) — 20Δ P — IV 37.79%2026-10-16 (22d) — 15Δ P — IV 37.59%2026-10-16 (22d) — 10Δ P — IV 39.55%2026-10-16 (22d) — 5Δ P — IV 43.66%22d2026-10-23 (29d) — 10Δ C — IV 37.01%2026-10-23 (29d) — 15Δ C — IV 35.62%2026-10-23 (29d) — 20Δ C — IV 34.27%2026-10-23 (29d) — 25Δ C — IV 33.96%2026-10-23 (29d) — 30Δ C — IV 33.82%2026-10-23 (29d) — 35Δ C — IV 33.74%2026-10-23 (29d) — 40Δ C — IV 33.70%2026-10-23 (29d) — 45Δ C — IV 33.71%2026-10-23 (29d) — ATM — IV 33.77%2026-10-23 (29d) — 45Δ P — IV 33.84%2026-10-23 (29d) — 40Δ P — IV 33.92%2026-10-23 (29d) — 35Δ P — IV 34.05%2026-10-23 (29d) — 30Δ P — IV 34.19%2026-10-23 (29d) — 25Δ P — IV 34.35%2026-10-23 (29d) — 20Δ P — IV 34.54%29d10Δ C25Δ CATM25Δ P10Δ Pout-of-the-money calls ← delta → out-of-the-money puts

The axis is call delta. Readings to the right of the dashed centre line are taken from the out-of-the-money put at that strike, which is the contract whose quote the volatility was solved from. Points are only plotted where surviving quotes bracket the delta on both sides; nothing is extrapolated past the last traded strike.

Show the underlying numbers
Delta15d22d29d
10Δ call39.83%39.72%37.01%
15Δ call37.29%37.05%35.62%
20Δ call36.19%35.10%34.27%
25Δ call35.53%33.95%33.96%
30Δ call35.09%33.90%33.82%
35Δ call34.91%33.93%33.74%
40Δ call34.91%33.97%33.70%
45Δ call34.92%34.36%33.71%
ATM34.93%35.73%33.77%
45Δ put34.95%37.32%33.84%
40Δ put34.98%37.89%33.92%
35Δ put35.05%37.97%34.05%
30Δ put35.16%38.02%34.19%
25Δ put35.32%38.00%34.35%
20Δ put35.71%37.79%34.54%
15Δ put36.64%37.59%—
10Δ put—39.55%—
5Δ put—43.66%—

Wing readings by expiration

ExpirationDaysForwardATM IV25Δ put25Δ callRRButterflyQuotes
2026-10-0915$13.6134.93%35.32%35.53%-0.22+0.496
2026-10-1622$13.7135.73%38.00%33.95%+4.05+0.2410
2026-10-2329$13.6433.77%34.35%33.96%+0.39+0.398
2026-11-2057$13.6936.02%36.61%35.60%+1.01+0.099
2026-12-1885$13.6534.88%35.80%34.81%+0.99+0.4312
2027-01-15113$13.7435.44%35.54%32.37%+3.17-1.4913
2027-03-19176$13.5535.18%36.22%33.92%+2.29-0.1114

Each curve above is one expiration. The vertical position is implied volatility; the horizontal position is the delta of the contract it was read from. For US equities the curve normally slopes upward to the right, meaning out-of-the-money puts carry higher implied volatility than equidistant calls.

The 25-delta risk reversal summarises that slope as a single number: the 25-delta put volatility minus the 25-delta call volatility. The butterfly summarises the curvature: the average of the two wings minus the at-the-money reading.

Term structure

At-the-money implied volatility by expiration

At-the-money implied volatility by expiration

7 listed expirations produced a usable reading

33%34%35%36%37%2026-10-09 — 15 days — at-the-money IV 34.93%2026-10-16 — 22 days — at-the-money IV 35.73%2026-10-23 — 29 days — at-the-money IV 33.77%2026-11-20 — 57 days — at-the-money IV 36.02%2026-12-18 — 85 days — at-the-money IV 34.88%2027-01-15 — 113 days — at-the-money IV 35.44%2027-03-19 — 176 days — at-the-money IV 35.18%306090days to expiration

The horizontal axis is the square root of days to expiration, which is the scale volatility lives on. A curve that is flat in variance terms plots as a straight line here rather than bending sharply through the front week.

Show the underlying numbers
ExpirationDaysForwardATM IVATM strikeQuotes used
2026-10-0915 days$13.6134.93%$13.646
2026-10-1622 days$13.7135.73%$13.7610
2026-10-2329 days$13.6433.77%$13.708
2026-11-2057 days$13.6936.02%$13.839
2026-12-1885 days$13.6534.88%$13.8512
2027-01-15113 days$13.7435.44%$14.0113
2027-03-19176 days$13.5535.18%$13.9614

Constant maturities

Interpolated between the bracketing listed expirations, in total variance

30 days
33.93%
60 days
35.85%
90 days
35.00%
180 days
—

Interpolation is linear in total variance, not in volatility. Interpolating volatility directly implies a forward variance that can be negative between two expirations. A tenor beyond the longest listed expiration is reported as unavailable rather than extrapolated.

Term structure slope

Last 4 sessions

0.981.001.021.041.061.081.102026-09-21 — 90-day over 30-day 1.002026-09-22 — 90-day over 30-day 1.092026-09-23 — 90-day over 30-day 1.032026-09-24 — 90-day over 30-day 1.0321 Sep22 Sep23 Sep24 Sep

The dashed line marks 1.00, where the 90-day and 30-day at-the-money volatilities are equal. Above it the longer tenor carries the higher volatility.

The term structure is the at-the-money implied volatility of each listed expiration, plotted against how far away that expiration is. Its usual shape for a calm underlying slopes gently upward, because a longer horizon admits more uncertainty.

It inverts when the market prices a dated event: an expiration that captures a scheduled announcement carries the variance of that event on top of ordinary trading, so a shorter contract can print a higher volatility than a longer one.

Earnings

What the options priced in before each report, and what happened

Next report

2026-10-29Time not statedEstimated from its reporting cadence