Cal-Maine Foods, Inc. (CALM) Open Interest History
Open interest tracks the total number of outstanding options contracts. Rising OI alongside price moves can indicate growing commitment to the trend; declining OI suggests positions are being closed.
Cal-Maine Foods, Inc. (CALM) operates in the Consumer Defensive sector, specifically the Agricultural Farm Products industry, with a market capitalization near $3.86B, listed on NASDAQ, employing roughly 4,836 people, carrying a beta of 0.23 to the broader market. Cal-Maine Foods, Inc. Led by Sherman L. Miller, public since 1996-12-12.
Snapshot as of Aug 14, 2026.
- Spot Price
- $80.67
- Call OI
- 14.3K
- Put OI
- 13.6K
- Total OI
- 27.9K
- Put/Call Ratio
- 0.38
As of Aug 14, 2026, Cal-Maine Foods, Inc. (CALM) has 27.9K total contracts outstanding across all expirations. Put/call OI ratio is 0.95 (balanced positioning). Open interest reflects accumulated positions from prior sessions; persistent growth indicates sustained directional or hedging interest, while sharp drops typically mean post-expiration clean-up.
How CALM open interest history Data Feeds Strategy Selection
Strategy selection on Cal-Maine Foods, Inc. options does not derive from any single metric in isolation. The open interest history view above sits inside a broader read: ATM IV currently sits at 31.7% and dealer gamma exposure is negative, so dealer hedging amplifies directional moves. Combine the open interest history data here with the volatility-skew surface, dealer-gamma exposure, max-pain level, and upcoming-events calendar to build a positioning thesis. Risk-defined structures (credit spreads, debit spreads, iron condors) are usually safer than naked positions while the regime is uncertain; the data on this page anchors the inputs but does not by itself constitute a trade thesis.
How to read the CALM open-interest data
The open-interest time-series above tracks the total Cal-Maine Foods, Inc. options inventory outstanding day by day. OI is a stock measure - the cumulative position count - so trends flag accumulating or distributing positioning. Current put/call ratio is 0.38, call-heavy - speculative or bullish positioning dominates. Total call OI of 14.3K versus put OI of 13.6K gives a put/call OI ratio of 0.95 - structurally a slower-moving signal than the volume-based ratio.
CALM flow vs positioning
Volume tells you what flows happened today; OI tells you what positions accumulated. Both can move in opposite directions: rising volume with falling OI means contracts are being closed (covering); rising volume with rising OI means new positions are being opened. The combination matters more than either alone for reading sentiment. Combined with the current negative dealer-gamma regime, large OI clusters tend to act as price repellents that accelerate moves through key strikes.
Using CALM OI/volume data alongside other surfaces
Per-strike OI is the input to dealer-gamma calculations: strikes with elevated call OI generate gamma walls that dealers must hedge into as spot approaches them. The gamma-exposure page combines this distribution with the dealers' assumed-long-gamma assumption to project hedge flow. Volume cross-checks recent positioning shifts in the chain that haven't yet shown up in cumulative OI. Pair both with the term-structure view on the volatility page to determine whether the activity is concentrated in near-dated event hedging or longer-dated structural positioning. Front-month expiration for CALM sits at 35 days, so near-dated volume currently dominates the flow reading.
Learn how open interest is reported and how to read the data →
Daily open-interest history for CALM options over the last ~30 trading days. Each row reflects the end-of-day total OI summed across all listed strikes and expirations.
Most recent 15 trading days (descending). Older history appears in the chart above.
| Date | Call OI | Put OI | Total OI | P/C OI |
|---|---|---|---|---|
| Aug 14, 2026 | 14.3K | 13.6K | 27.9K | 0.95 |
| Aug 13, 2026 | 14.3K | 13.6K | 27.9K | 0.95 |
| Aug 12, 2026 | 14.2K | 13.5K | 27.7K | 0.95 |
| Aug 11, 2026 | 13.9K | 13.5K | 27.4K | 0.97 |
| Aug 10, 2026 | 13.8K | 13.4K | 27.2K | 0.97 |
| Aug 7, 2026 | 13.9K | 13.3K | 27.2K | 0.96 |
| Aug 6, 2026 | 13.9K | 13.3K | 27.1K | 0.96 |
| Aug 5, 2026 | 13.9K | 13.2K | 27.1K | 0.95 |
| Aug 4, 2026 | 13.6K | 13.1K | 26.7K | 0.96 |
| Jul 31, 2026 | 12.3K | 12.6K | 24.8K | 1.02 |
| Jul 30, 2026 | 12.3K | 12.9K | 25.2K | 1.05 |
| Jul 29, 2026 | 12.6K | 16.2K | 28.8K | 1.28 |
| Jul 28, 2026 | 12.3K | 16.1K | 28.5K | 1.31 |
| Jul 24, 2026 | 11.6K | 15.4K | 27.0K | 1.33 |
| Jul 23, 2026 | 11.5K | 15.4K | 26.8K | 1.34 |
CALM highest open-interest contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| PUT | $80.00 | Aug 21, 2026 | 20 | 4.0K | 28.8% | $0.70 | $1.10 |
Top 1 contracts from the institutional-grade nightly options scan; ranked by oi within the broader S&P 500/400/600 + ETF universe.
Frequently asked CALM open interest history questions
- What is the current CALM options open interest?
- As of Aug 14, 2026, Cal-Maine Foods, Inc. (CALM) has 27.9K total contracts outstanding across all listed expirations, split as 14.3K calls and 13.6K puts. Open interest reflects accumulated positions from prior trading sessions; it does not include today's volume until end-of-day reconciliation.
- What is the CALM put/call open interest ratio?
- Put/call OI ratio of 0.95 is balanced.
- What does CALM open interest tell traders?
- Persistent OI growth indicates sustained directional or hedging interest; sharp drops typically mean post-expiration position cleanup. Heavy OI concentrations at specific strikes act as support and resistance levels because dealer hedging amplifies near those strikes - the gamma profile of the dealer book is concentrated there. Comparing today's volume to standing OI separates opening flow from closing flow.