BUSM - EA Series Trust - EA Bridgeway Ultra-Small Company Market ETF
BUSM aims for long-term total return on capital, primarily through capital appreciation, by investing in ultra-small companies. It considers ultra-small companies as those with market capitalization of less than $1 billion. The fund selects smallest 10% of stocks from a universe of US-listed companies.
- Sector
- Financial Services
- Industry
- Asset Management
- Market Cap
- $111.3M
- Beta
- 1.40
- 52-Week Range
- 15.22-17.53
- IPO Date
- Jul 27, 2026
- Exchange
- CBOE
BUSM Options Snapshot
Options pricing data for BUSM is refreshed daily after the close. When listed contracts exist, this page surfaces the latest at-the-money implied volatility, max pain strike, dealer gamma exposure (GEX), and 25-delta skew. Listed contracts and live snapshots appear once the options chain has been published by the exchange for the most recent session.
What This Page Covers
The BUSM 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.
BUSM fund facts: expense ratio 0.73%, assets under management $116.8M, NAV $15.93 as of the data source's update on Oct 8, 2026, launched Jul 31, 1997, issued by Bridgeway. See the BUSM holdings.
Frequently asked BUSM overview questions
- What is BUSM?
- BUSM is the ticker symbol for EA Series Trust - EA Bridgeway Ultra-Small Company Market ETF, an listed exchange-traded fund. BUSM aims for long-term total return on capital, primarily through capital appreciation, by investing in ultra-small companies. It considers ultra-small companies as those with market capitalization of less than $1 billion. Listed on CBOE. BUSM 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 are BUSM's key statistics?
- EA Series Trust - EA Bridgeway Ultra-Small Company Market ETF (BUSM) carries a market capitalization of $111.3M, 52-week range of 15.22-17.53. 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 BUSM belong to?
- EA Series Trust - EA Bridgeway Ultra-Small Company Market ETF operates in the Financial Services sector, in the Asset Management 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 BUSM'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 BUSM data on this page?
- Options snapshots refresh after each trading session; if no snapshot is currently posted for BUSM, it usually reflects low options liquidity or a recently listed name. 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.