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Amphastar Pharmaceuticals AMPH

$25.54 −$0.37 (-1.43%)
Pre-market · Oct 8, 7:20 am ET · After hours $25.54 0.00%
Open$25.91
Prev close$25.91
Day range$25.29 – $26.17
Volume776.3K
Market cap$1.09B
P/E (TTM)15.1
Dividend yield–

Average implied volatility across the listed chain right now: 111%. Implied volatility measures how big a price swing the options market is pricing in — there is no fixed “normal” level, it varies a lot by stock.

Open interest by strike

13151820232530CallsPuts

Nearest listed expiry only. Calls above the line, puts below — clusters mark strikes where the market has built up the most open positions.

Implied volatility by strike

-28%85%198%311%132030CallsPuts

The “volatility smile”: strikes far from the current price often price in richer implied volatility than at-the-money strikes.

Calls

ExpiryStrikeLastBid/AskVolumeOpen interestIV
16 Oct 2026 $25.00 $1.30 $0.80/$0.90 60 434 34%
16 Oct 2026 $22.50 $3.47 $1.10/$5.20 0 6 62%
16 Oct 2026 $30.00 $0.14 $0.00/$0.15 0 1,354 79%
16 Oct 2026 $20.00 $5.91 $3.70/$7.70 0 10 115%
16 Oct 2026 $17.50 $8.41 $6.10/$10.20 0 0 150%
16 Oct 2026 $15.00 $10.91 $8.60/$12.70 0 0 201%
16 Oct 2026 $12.50 $13.41 $11.10/$15.30 0 0 283%

Puts

ExpiryStrikeLastBid/AskVolumeOpen interestIV
16 Oct 2026 $25.00 $0.84 $0.00/$3.50 0 1 72%
16 Oct 2026 $22.50 $0.17 $0.00/$3.40 0 1 74%
16 Oct 2026 $30.00 $4.40 $2.30/$6.40 0 0 0%
16 Oct 2026 $20.00 $0.01 $0.00/$3.40 0 0 75%
16 Oct 2026 $17.50 $0.00 $0.00/$0.50 0 1 75%
16 Oct 2026 $15.00 $0.00 $0.00/$3.40 0 0 97%
16 Oct 2026 $12.50 $0.00 $0.00/$3.40 0 0 128%

Open interest = contracts currently outstanding (not yet closed out). Higher open interest generally means a strike/expiry is more actively traded and easier to get in and out of.

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