Mesabi (MSB) Options Chain
NYSE: MSBIndustrialsPrecious MetalsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Dec 18, 2026
- Days to expiration
- 68
- Share price
- $18.42
- Put/call ratio (OI)
- 0.58
- Put/call ratio (volume)
- 4.77
- Expected move
- ±$7.68
- Open interest (C / P)
- 223 / 130
MSB options summary
The MSB options chain for the December 18, 2026 expiration lists 7 call and 6 put contracts, with 68 days until expiration. Open interest stands at 223 calls and 130 puts, a put/call ratio of 0.58, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $17.50 strike is 96.6%, which implies the market expects a move of about ±$7.68 (41.7%) in Mesabi stock by expiration.
The most open interest sits at the $22.50 call (141 contracts) and the $12.50 put (55 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
MSB options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 12.50 | 0.00 | 4.90 | 0.15 | |||||
| — | — | — | 17.50 | 0.20 | 4.90 | 1.50 | |||||
| 2.30 | 0.00 | 3.70 | 20.00 | 0.20 | 4.90 | 2.60 | |||||
| 1.40 | 0.00 | 3.20 | 22.50 | 2.00 | 5.20 | 4.25 | |||||
| 0.22 | 0.15 | 0.40 | 25.00 | 1.80 | 6.50 | 3.30 | |||||
| 0.75 | 0.00 | 0.55 | 30.00 | 4.00 | 8.50 | 7.66 | |||||
| 0.30 | 0.00 | 1.50 | 35.00 | — | — | — | |||||
| 0.52 | 0.00 | 3.40 | 40.00 | — | — | — | |||||
| 0.35 | 0.00 | 0.60 | 45.00 | — | — | — | |||||
In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.
Frequently asked questions
What is the MSB put/call ratio?
For the December 18, 2026 expiration, the MSB put/call ratio based on open interest is 0.58 (130 puts vs 223 calls), and 4.77 based on today's volume. A ratio above 1 means more puts than calls.
What is MSB's implied volatility?
At-the-money implied volatility for MSB options expiring December 18, 2026 is about 96.6%, an annualized estimate of how much the market expects Mesabi stock to move.
How many MSB option expiration dates are there?
MSB has 4 listed expiration dates, from Oct 16, 2026 to Mar 19, 2027.
What does "in the money" mean?
A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.