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NB Bancorp NBBK

US equityMarket cap rank #3264Banks - Regional
$22.27 −$0.19 (-0.85%)
Pre-market · Oct 8, 8:10 am ET · After hours $22.27 0.00%
Open$22.13
Prev close$22.46
Day range$22.08 – $22.41
Volume160.6K
Market cap$975.84M
P/E (TTM)14.7
Dividend yield1.26%

Average implied volatility across the listed chain right now: 93%. 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

-31%94%219%344%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 $22.50 $0.52 $0.05/$0.80 0 31 39%
16 Oct 2026 $20.00 $2.56 $0.20/$4.40 0 1 37%
16 Oct 2026 $25.00 $0.02 $0.00/$0.75 0 47 41%
16 Oct 2026 $17.50 $5.01 $2.95/$6.90 0 0 117%
16 Oct 2026 $15.00 $7.50 $5.40/$9.30 0 0 149%
16 Oct 2026 $30.00 $0.00 $0.00/$0.75 0 0 59%
16 Oct 2026 $12.50 $10.00 $8.60/$11.80 0 0 313%

Puts

ExpiryStrikeLastBid/AskVolumeOpen interestIV
16 Oct 2026 $22.50 $0.51 $0.00/$2.65 0 0 29%
16 Oct 2026 $20.00 $0.05 $0.00/$0.75 0 0 50%
16 Oct 2026 $25.00 $2.54 $0.70/$4.00 0 0 0%
16 Oct 2026 $17.50 $0.00 $0.00/$0.75 0 0 65%
16 Oct 2026 $15.00 $0.00 $0.00/$0.25 0 10 73%
16 Oct 2026 $30.00 $7.54 $6.80/$9.00 0 0 138%
16 Oct 2026 $12.50 $0.00 $0.00/$0.75 0 0 105%

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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