iPath Series B Carbon ETN (GRN) Volatility Skew
Implied volatility skew shows how IV varies across strike prices for a given expiration. Steeper skews indicate higher demand for downside protection relative to upside speculation.
iPath Series B Carbon ETN (GRN) operates in the Financial Services sector, specifically the Asset Management industry, with a market capitalization near $10.8M, listed on AMEX, carrying a beta of 0.40 to the broader market. The iPath Series B Carbon ETNs are designed to provide exposure to the Barclays Global Carbon II TR USD Index. public since 2019-09-18.
Snapshot as of May 15, 2026.
- Spot Price
- $29.99
- ATM IV
- 42.4%
- IV Skew 25Δ
- 0.001
- IV Rank
- 8.2%
- IV Percentile
- 18.7%
- Term Structure Slope
- 0.018
As of May 15, 2026, iPath Series B Carbon ETN (GRN) at-the-money implied volatility is 42.4%. IV rank is 8.2% (where 0% is the 52-week low and 100% is the 52-week high). IV percentile is 18.7%. The 25-delta skew is +0.001: skew is roughly flat across the 25-delta wings. High IV rank typically favors premium-selling strategies; low IV rank favors premium-buying.
GRN Strategy Selection at Current Volatility Levels
For iPath Series B Carbon ETN options at 42.4% ATM IV, low IV rank (8.2%) favors premium-buying or long-vol structures: long calls or puts, debit spreads, calendar spreads, long straddles. The risk: low-rank regimes can persist for months while time decay eats premium-buyers alive. Pair the vol-rank read with the dealer-gamma view and the upcoming-events calendar to confirm the strategy fits both the structural regime and the path-dependent risk. The variance risk premium - the persistent gap between implied and subsequently realized vol - is positive in equity markets on average; high IV rank typically reflects a stretch where the premium is wider than usual.
Learn how volatility skew is reported and how to read the data →
Frequently asked GRN volatility skew questions
- What is the current GRN ATM implied volatility?
- As of May 15, 2026, iPath Series B Carbon ETN (GRN) at-the-money implied volatility is 42.4%. IV rank is 8.2% on a 0-100% scale anchored to the 1-year IV range. ATM IV is the volatility input that makes a Black-Scholes-equivalent model reproduce the listed at-the-money option prices.
- Is GRN IV high or low historically?
- IV is subdued relative to its 1-year history, conditions that typically favor premium-buying strategies (long calls, long puts, debit spreads, calendar spreads).
- What does GRN volatility skew tell options traders?
- Volatility skew is the pattern by which IV varies across strikes for a given expiration. iPath Series B Carbon ETN skew is roughly flat across the 25-delta wings. Skew matters for risk-defined strategy selection: when downside puts are rich, put-credit spreads capture more premium; when upside calls are rich, call-credit spreads or covered-call writes harvest more.