CLFD · Clearfield, Inc.

Track CLFD — free

$28.79 +0.05 (+0.17%) At close · Aug 14

Market Cap

$391.08M

13.58M

Options Chain

Underlying $28.79 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 20 contracts · mixed snapshot sessions · Jul 6, 2026–Aug 14, 2026; 5 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 5d Sep 18 33d Dec 18 124d Mar 19 215d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	239.6%	0.92	—		$0.10	-0.036	179.2%	105	68
Call · $20 In the money Snapshot session Unknown Last — Breakeven — Implied vol 239.6% Delta 0.92 ≈92% ITM Gamma 0.018 Theta -0.118 Vega 0.005 Open interest 0 Model this call Put · $20 Snapshot session Aug 6, 2026 Last $0.10 Breakeven $19.90 Implied vol 179.2% Delta -0.036 ≈4% ITM Gamma 0.013 Theta -0.046 Vega 0.003 Open interest 68 Model this put
0	—	170.8%	0.904	—		$0.35	-0.101	175.7%	51	24
Call · $22.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 170.8% Delta 0.904 ≈90% ITM Gamma 0.029 Theta -0.098 Vega 0.005 Open interest 0 Model this call Put · $22.5 Snapshot session Aug 6, 2026 Last $0.35 Breakeven $22.15 Implied vol 175.7% Delta -0.101 ≈10% ITM Gamma 0.029 Theta -0.102 Vega 0.005 Open interest 24 Model this put
6	2	105.2%	0.883	$3.76		$0.15	-0.118	105.7%	2	57
Call · $25 In the money Snapshot session Aug 7, 2026 Last $3.76 Breakeven $28.76 Implied vol 105.2% Delta 0.883 ≈88% ITM Gamma 0.055 Theta -0.071 Vega 0.006 Open interest 6 Model this call Put · $25 Snapshot session Aug 12, 2026 Last $0.15 Breakeven $24.85 Implied vol 105.7% Delta -0.118 ≈12% ITM Gamma 0.055 Theta -0.069 Vega 0.006 Open interest 57 Model this put
Underlying $28.79
28	2	66.8%	0.323	$0.95		$1.70	-0.647	79.3%	4	69
Call · $30 Snapshot session Aug 14, 2026 Last $0.95 Breakeven $30.95 Implied vol 66.8% Delta 0.323 ≈32% ITM Gamma 0.155 Theta -0.08 Vega 0.012 Open interest 28 Model this call Put · $30 In the money Snapshot session Aug 13, 2026 Last $1.70 Breakeven $28.30 Implied vol 79.3% Delta -0.647 ≈65% ITM Gamma 0.137 Theta -0.096 Vega 0.012 Open interest 69 Model this put
90	11	109.4%	0.076	$0.10		$7.65	—	—	2	23
Call · $35 Snapshot session Aug 13, 2026 Last $0.10 Breakeven $35.10 Implied vol 109.4% Delta 0.076 ≈8% ITM Gamma 0.038 Theta -0.052 Vega 0.004 Open interest 90 Model this call Put · $35 In the money Snapshot session Aug 7, 2026 Last $7.65 Breakeven $27.35 Implied vol — Delta — Gamma — Theta — Vega — Open interest 23 Model this put
196	27	154.8%	0.047	$0.03		$9.92	—	—	2	0
Call · $40 Snapshot session Aug 14, 2026 Last $0.03 Breakeven $40.03 Implied vol 154.8% Delta 0.047 ≈5% ITM Gamma 0.018 Theta -0.05 Vega 0.004 Open interest 196 Model this call Put · $40 In the money Snapshot session Jul 22, 2026 Last $9.92 Breakeven $30.08 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
60	40	187.9%	0.031	$0.05		$12.25	—	—	1	0
Call · $45 Snapshot session Aug 13, 2026 Last $0.05 Breakeven $45.05 Implied vol 187.9% Delta 0.031 ≈3% ITM Gamma 0.011 Theta -0.043 Vega 0.002 Open interest 60 Model this call Put · $45 In the money Snapshot session Jul 9, 2026 Last $12.25 Breakeven $32.75 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
23	7	279%	0.071	$0.37		—	—	—	—	0
Call · $50 Snapshot session Aug 4, 2026 Last $0.37 Breakeven $50.37 Implied vol 279% Delta 0.071 ≈7% ITM Gamma 0.014 Theta -0.123 Vega 0.005 Open interest 23 Model this call Put · $50 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	2	340.3%	0.085	$0.70		—	—	—	—	0
Call · $55 Snapshot session Jul 6, 2026 Last $0.70 Breakeven $55.70 Implied vol 340.3% Delta 0.085 ≈8% ITM Gamma 0.013 Theta -0.173 Vega 0.005 Open interest 2 Model this call Put · $55 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
26	1	376.7%	0.083	$0.05		—	—	—	—	0
Call · $60 Snapshot session Aug 14, 2026 Last $0.05 Breakeven $60.05 Implied vol 376.7% Delta 0.083 ≈8% ITM Gamma 0.012 Theta -0.187 Vega 0.005 Open interest 26 Model this call Put · $60 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jul 6, 2026–Aug 14, 2026; 5 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown.

Key facts CIK 796505 CUSIP 18482P103 13F (30d) 121 filings 121 filers Visit website Investor relations