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Alto Neuroscience ANRO

US equityMarket cap rank #3294Biotechnology
$23.52 −$0.17 (-0.72%)
Pre-market · Oct 8, 8:20 am ET · After hours $23.97 +1.92%
Open$23.39
Prev close$23.69
Day range$23.33 – $24.42
Volume348.0K
Market cap$922.97M
P/E (TTM)–
Dividend yield–

Average implied volatility across the listed chain right now: 379%. 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

2.507.50131823304045CallsPuts

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

-114%343%801%1259%2.501845CallsPuts

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 $22.50 $2.61 $0.75/$4.80 0 5 160%
16 Oct 2026 $25.00 $2.28 $0.00/$4.90 0 117 202%
16 Oct 2026 $20.00 $4.95 $2.00/$6.00 0 70 127%
16 Oct 2026 $17.50 $7.29 $4.50/$8.50 0 0 191%
16 Oct 2026 $30.00 $1.73 $0.00/$4.90 0 141 262%
16 Oct 2026 $15.00 $9.62 $7.20/$11.00 0 10 277%
16 Oct 2026 $12.50 $11.96 $9.50/$13.50 0 0 342%
16 Oct 2026 $35.00 $0.05 $0.00/$0.05 10 168 131%
16 Oct 2026 $10.00 $14.30 $12.00/$16.00 0 0 441%
16 Oct 2026 $7.50 $16.63 $14.50/$18.50 0 0 572%
16 Oct 2026 $40.00 $0.68 $0.00/$4.90 0 88 283%
16 Oct 2026 $5.00 $18.97 $17.00/$21.00 0 0 766%
16 Oct 2026 $2.50 $21.31 $19.50/$23.50 0 0 1,144%
16 Oct 2026 $45.00 $0.39 $0.00/$4.90 0 12 282%

Puts

ExpiryStrikeLastBid/AskVolumeOpen interestIV
16 Oct 2026 $22.50 $1.39 $0.00/$2.00 0 3 134%
16 Oct 2026 $25.00 $3.56 $0.40/$4.60 0 170 114%
16 Oct 2026 $20.00 $1.23 $0.00/$2.55 0 3 201%
16 Oct 2026 $17.50 $1.07 $0.00/$4.90 0 2 263%
16 Oct 2026 $30.00 $8.00 $4.40/$8.00 0 56 0%
16 Oct 2026 $15.00 $0.91 $0.00/$4.90 0 0 327%
16 Oct 2026 $12.50 $0.75 $0.00/$4.90 0 0 395%
16 Oct 2026 $35.00 $12.44 $9.20/$13.00 0 2 0%
16 Oct 2026 $10.00 $0.58 $0.00/$4.90 0 0 469%
16 Oct 2026 $7.50 $0.42 $0.00/$4.90 0 0 556%
16 Oct 2026 $40.00 $16.94 $14.20/$18.00 0 0 0%
16 Oct 2026 $5.00 $0.26 $0.00/$4.90 0 0 662%
16 Oct 2026 $2.50 $0.10 $0.00/$0.05 0 20 801%
16 Oct 2026 $45.00 $21.66 $19.20/$23.00 0 0 0%

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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