Select Medical Holdings Corporation (SEM) 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.
Select Medical Holdings Corporation (SEM) operates in the Healthcare sector, specifically the Medical - Care Facilities industry, with a market capitalization near $2.04B, listed on NYSE, employing roughly 30,000 people, carrying a beta of 0.80 to the broader market. Select Medical Holdings Corporation, through its subsidiaries, operates critical illness recovery hospitals, rehabilitation hospitals, outpatient rehabilitation clinics, and occupational health centers in the United States. Led by Thomas Mullin, public since 2009-09-25.
Snapshot as of May 15, 2026.
- Spot Price
- $16.51
- Call OI
- 278
- Put OI
- 1.5K
- Total OI
- 1.7K
- Put/Call Ratio
- 0.00
As of May 15, 2026, Select Medical Holdings Corporation (SEM) has 1.7K total contracts outstanding across all expirations. Put/call OI ratio is 5.24 (put-heavy positioning, often indicating hedging or bearish bias). 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 SEM open interest history Data Feeds Strategy Selection
Strategy selection on Select Medical Holdings Corporation 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 155.2% 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.
Learn how open interest is reported and how to read the data →
Frequently asked SEM open interest history questions
- What is the current SEM options open interest?
- As of May 15, 2026, Select Medical Holdings Corporation (SEM) has 1.7K total contracts outstanding across all listed expirations, split as 278 calls and 1.5K 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 SEM put/call open interest ratio?
- Put/call OI ratio of 5.24 is put-heavy, often indicating hedging demand or bearish positioning.
- What does SEM 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.