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Geron GERN

US equityMarket cap rank #3434Biotechnology
$1.20 −$0.01 (-0.83%)
Pre-market · Oct 8, 8:20 am ET · After hours $1.20 0.00%
Open$1.21
Prev close$1.21
Day range$1.19 – $1.22
Volume5.14M
Market cap$770.97M
P/E (TTM)–
Dividend yield–

Average implied volatility across the listed chain right now: 185%. 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

0.501.001.502.003.004.005.00CallsPuts

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

-39%116%270%424%0.502.005.00CallsPuts

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 $1.00 $0.25 $0.00/$0.50 0 535 189%
16 Oct 2026 $1.50 $0.01 $0.00/$0.05 0 2,474 109%
16 Oct 2026 $0.50 $0.71 $0.40/$1.00 0 0 0%
16 Oct 2026 $2.00 $0.00 $0.00/$0.05 0 121 131%
16 Oct 2026 $3.00 $0.00 $0.00/$0.15 0 1 189%
16 Oct 2026 $4.00 $0.00 $0.00/$0.75 0 0 240%
16 Oct 2026 $5.00 $0.00 $0.00/$0.75 0 0 279%

Puts

ExpiryStrikeLastBid/AskVolumeOpen interestIV
16 Oct 2026 $1.00 $0.04 $0.00/$0.05 0 350 169%
16 Oct 2026 $1.50 $0.32 $0.05/$0.45 15 470 0%
16 Oct 2026 $0.50 $0.00 $0.00/$0.05 0 0 267%
16 Oct 2026 $2.00 $0.79 $0.45/$1.20 0 0 257%
16 Oct 2026 $3.00 $1.79 $1.45/$2.20 0 0 386%
16 Oct 2026 $4.00 $2.79 $2.30/$3.30 0 0 1%
16 Oct 2026 $5.00 $3.79 $3.30/$4.30 0 0 1%

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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