IDEF - iShares Defense Industrials Act
The fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its net assets plus any borrowings for investment purposes in equity securities issued by U. S. and non-U.
As of Aug 14, 2026: spot at $35.48, ATM IV 44.6%, max pain $37.00, net GEX $1.4K.
- Sector
- Industrials
- Industry
- Aerospace & Defense
- Market Cap
- $4.47B
- Beta
- 0.82
- 52-Week Range
- 28.01-36.88
- Dividend Yield
- $0.11
- IPO Date
- May 19, 2025
- Exchange
- NASDAQ
What IDEF Looks Like to Options Traders Today
positive net gamma exposure ($1.4K) means dealers hedge against trend, damping realized volatility and biasing price toward heavy-OI strikes; the 25-delta skew (0.015) is roughly flat across the wings.
What This Page Covers
The IDEF overview links into per-metric analysis views: max pain, gamma exposure, volatility skew, expected move, options chain, open interest history, and aggregate Greeks. Microstructure data is available on short interest, short volume, fail-to-deliver, and market structure.
Frequently asked IDEF overview questions
- What is IDEF?
- IDEF is the ticker symbol for iShares Defense Industrials Act, an listed exchange-traded fund. The fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its net assets plus any borrowings for investment purposes in equity securities issued by U. S. Listed on NASDAQ. IDEF is the ETF ticker shown on this page; ETF traders use the fund for diversified exposure to its underlying basket, for sector and factor rotation, and for hedging or replication strategies via the listed options chain.
- What does the IDEF options snapshot look like today?
- As of Aug 14, 2026, the IDEF options snapshot shows spot at $35.48, ATM IV 44.6%, max pain $37.00, net GEX $1.4K, expected move 12.79%. The full options chain, Greeks by strike and expiration, per-strike open-interest distribution, dealer gamma and delta exposure, and the volatility skew surface are linked from this overview page. Each per-metric route refreshes once per trading session and reflects the most recent close-of-business listed-options state.
- What are IDEF's key statistics?
- iShares Defense Industrials Act (IDEF) carries a market capitalization of $4.47B, 52-week range of 28.01-36.88. Full holdings disclosure, expense ratio, and tracking-error history live on the per-ticker fundamentals page or the sponsor's site; daily NAV and premium/discount-to-NAV are accessible from the same view. These structural inputs frame how the ETF options market prices implied volatility relative to its constituents.
- What sector or industry does IDEF belong to?
- iShares Defense Industrials Act operates in the Industrials sector, in the Aerospace & Defense industry. Sector classification affects how the ticker correlates with sector ETFs, how it reacts to macro factors like rate moves and commodity prices, and how its options pricing compares to sector peers. Compare IDEF's implied volatility and skew against sector benchmarks to gauge whether the options market is pricing single-name or systemic risk relative to the broader peer group.
- How current is the IDEF data on this page?
- The options snapshot above is dated Aug 14, 2026 and refreshes once per session, with all per-strike Greeks and exposure aggregates recomputed at the daily close. Fund-level fields (sponsor, expense ratio, holdings concentration where available) refresh from the vendor feed nightly. ETF-specific filings (N-CSR, N-PX, N-CEN) update on the SEC EDGAR cadence. FINRA microstructure data refreshes on the source's cadence; for ETFs the off-exchange volume signal is dominated by authorized-participant creation and redemption rather than directional flow.