FSS · Federal Signal Corp /De/

Track FSS — free

$125.85 +2.79 (+2.27%) At close · Aug 14

Market Cap

$7.68B

61.04M

Options Chain

Underlying $125.85 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 44 contracts · mixed snapshot sessions · Dec 23, 2025–Aug 13, 2026; 19 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 Nov 20 96d Feb 19 187d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	284.3%	0.99	—		—	—	—	—	0
Call · $60 In the money Snapshot session Unknown Last — Breakeven — Implied vol 284.3% Delta 0.99 ≈99% ITM Gamma 0.001 Theta -0.112 Vega 0.005 Open interest 0 Model this call Put · $60 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	255.3%	0.989	—		—	—	—	—	0
Call · $65 In the money Snapshot session Unknown Last — Breakeven — Implied vol 255.3% Delta 0.989 ≈99% ITM Gamma 0.001 Theta -0.11 Vega 0.006 Open interest 0 Model this call Put · $65 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	228.5%	0.988	—		—	—	—	—	0
Call · $70 In the money Snapshot session Unknown Last — Breakeven — Implied vol 228.5% Delta 0.988 ≈99% ITM Gamma 0.001 Theta -0.107 Vega 0.006 Open interest 0 Model this call Put · $70 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	1	203.6%	0.986	$35.30		$1.05	-0.027	237.8%	1	1
Call · $75 In the money Snapshot session Apr 2, 2026 Last $35.30 Breakeven $110.30 Implied vol 203.6% Delta 0.986 ≈99% ITM Gamma 0.001 Theta -0.104 Vega 0.006 Open interest 0 Model this call Put · $75 Snapshot session Dec 24, 2025 Last $1.05 Breakeven $73.95 Implied vol 237.8% Delta -0.027 ≈3% ITM Gamma 0.002 Theta -0.205 Vega 0.012 Open interest 1 Model this put
0	—	188.4%	0.981	—		$0.55	-0.03	211.4%	1	0
Call · $80 In the money Snapshot session Unknown Last — Breakeven — Implied vol 188.4% Delta 0.981 ≈98% ITM Gamma 0.002 Theta -0.125 Vega 0.006 Open interest 0 Model this call Put · $80 Snapshot session Apr 15, 2026 Last $0.55 Breakeven $79.45 Implied vol 211.4% Delta -0.03 ≈3% ITM Gamma 0.002 Theta -0.2 Vega 0.012 Open interest 0 Model this put
0	—	158.6%	0.983	—		$2.30	-0.049	211.8%	10	11
Call · $85 In the money Snapshot session Unknown Last — Breakeven — Implied vol 158.6% Delta 0.983 ≈98% ITM Gamma 0.002 Theta -0.099 Vega 0.006 Open interest 0 Model this call Put · $85 Snapshot session Jul 29, 2026 Last $2.30 Breakeven $82.70 Implied vol 211.8% Delta -0.049 ≈5% ITM Gamma 0.003 Theta -0.304 Vega 0.013 Open interest 11 Model this put
0	—	158.5%	0.966	—		$2.40	-0.067	199%	10	14
Call · $90 In the money Snapshot session Unknown Last — Breakeven — Implied vol 158.5% Delta 0.966 ≈97% ITM Gamma 0.003 Theta -0.173 Vega 0.013 Open interest 0 Model this call Put · $90 Snapshot session Jul 29, 2026 Last $2.40 Breakeven $87.60 Implied vol 199% Delta -0.067 ≈7% ITM Gamma 0.004 Theta -0.362 Vega 0.023 Open interest 14 Model this put
0	—	136.4%	0.961	—		$0.25	-0.052	150.4%	3	7
Call · $95 In the money Snapshot session Unknown Last — Breakeven — Implied vol 136.4% Delta 0.961 ≈96% ITM Gamma 0.004 Theta -0.167 Vega 0.014 Open interest 0 Model this call Put · $95 Snapshot session Jul 7, 2026 Last $0.25 Breakeven $94.75 Implied vol 150.4% Delta -0.052 ≈5% ITM Gamma 0.005 Theta -0.225 Vega 0.014 Open interest 7 Model this put
0	—	93.2%	0.981	—		$0.29	-0.051	120.4%	2	5
Call · $100 In the money Snapshot session Unknown Last — Breakeven — Implied vol 93.2% Delta 0.981 ≈98% ITM Gamma 0.003 Theta -0.067 Vega 0.007 Open interest 0 Model this call Put · $100 Snapshot session Jul 31, 2026 Last $0.29 Breakeven $99.71 Implied vol 120.4% Delta -0.051 ≈5% ITM Gamma 0.006 Theta -0.176 Vega 0.014 Open interest 5 Model this put
5	1	88.6%	0.958	$16.60		$0.35	-0.062	101.5%	3	17
Call · $105 In the money Snapshot session Jul 30, 2026 Last $16.60 Breakeven $121.60 Implied vol 88.6% Delta 0.958 ≈96% ITM Gamma 0.007 Theta -0.12 Vega 0.014 Open interest 5 Model this call Put · $105 Snapshot session Aug 4, 2026 Last $0.35 Breakeven $104.65 Implied vol 101.5% Delta -0.062 ≈6% ITM Gamma 0.008 Theta -0.176 Vega 0.025 Open interest 17 Model this put
4	2	63%	0.963	$9.70		$0.55	-0.071	77.7%	1	509
Call · $110 In the money Snapshot session Jun 17, 2026 Last $9.70 Breakeven $119.70 Implied vol 63% Delta 0.963 ≈96% ITM Gamma 0.008 Theta -0.079 Vega 0.015 Open interest 4 Model this call Put · $110 Snapshot session Aug 4, 2026 Last $0.55 Breakeven $109.45 Implied vol 77.7% Delta -0.071 ≈7% ITM Gamma 0.011 Theta -0.148 Vega 0.025 Open interest 509 Model this put
14	2	55%	0.915	$18.30		$1.40	-0.109	61.8%	1	4
Call · $115 In the money Snapshot session Aug 4, 2026 Last $18.30 Breakeven $133.30 Implied vol 55% Delta 0.915 ≈92% ITM Gamma 0.018 Theta -0.128 Vega 0.026 Open interest 14 Model this call Put · $115 Snapshot session Jul 30, 2026 Last $1.40 Breakeven $113.60 Implied vol 61.8% Delta -0.109 ≈11% ITM Gamma 0.02 Theta -0.162 Vega 0.026 Open interest 4 Model this put
103	5	40.2%	0.84	$8.50		$4.70	-0.228	55.2%	30	61
Call · $120 In the money Snapshot session Aug 10, 2026 Last $8.50 Breakeven $128.50 Implied vol 40.2% Delta 0.84 ≈84% ITM Gamma 0.039 Theta -0.145 Vega 0.04 Open interest 103 Model this call Put · $120 Snapshot session Jul 30, 2026 Last $4.70 Breakeven $115.30 Implied vol 55.2% Delta -0.228 ≈23% ITM Gamma 0.036 Theta -0.235 Vega 0.052 Open interest 61 Model this put
23	5	41%	0.567	$6.05		$2.50	-0.434	41%	1	62
Call · $125 In the money Snapshot session Aug 7, 2026 Last $6.05 Breakeven $131.05 Implied vol 41% Delta 0.567 ≈57% ITM Gamma 0.062 Theta -0.233 Vega 0.061 Open interest 23 Model this call Put · $125 Snapshot session Aug 4, 2026 Last $2.50 Breakeven $122.50 Implied vol 41% Delta -0.434 ≈43% ITM Gamma 0.062 Theta -0.223 Vega 0.061 Open interest 62 Model this put
Underlying $125.85
190	1	47.5%	0.303	$3.65		$16.50	-0.752	37.5%	1	1
Call · $130 Snapshot session Aug 3, 2026 Last $3.65 Breakeven $133.65 Implied vol 47.5% Delta 0.303 ≈30% ITM Gamma 0.048 Theta -0.237 Vega 0.055 Open interest 190 Model this call Put · $130 In the money Snapshot session Jul 20, 2026 Last $16.50 Breakeven $113.50 Implied vol 37.5% Delta -0.752 ≈75% ITM Gamma 0.056 Theta -0.162 Vega 0.054 Open interest 1 Model this put
1	1	47%	0.12	$1.30		—	—	—	—	0
Call · $135 Snapshot session Mar 16, 2026 Last $1.30 Breakeven $136.30 Implied vol 47% Delta 0.12 ≈12% ITM Gamma 0.028 Theta -0.133 Vega 0.029 Open interest 1 Model this call Put · $135 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
6	3	61%	0.082	$0.48		—	—	—	—	0
Call · $140 Snapshot session Jul 28, 2026 Last $0.48 Breakeven $140.48 Implied vol 61% Delta 0.082 ≈8% ITM Gamma 0.016 Theta -0.132 Vega 0.029 Open interest 6 Model this call Put · $140 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	2	77.3%	0.072	$1.95		—	—	—	—	0
Call · $145 Snapshot session Jul 30, 2026 Last $1.95 Breakeven $146.95 Implied vol 77.3% Delta 0.072 ≈7% ITM Gamma 0.012 Theta -0.152 Vega 0.017 Open interest 1 Model this call Put · $145 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	88.8%	0.06	—		$27.00	—	—	1	2
Call · $150 Snapshot session Unknown Last — Breakeven — Implied vol 88.8% Delta 0.06 ≈6% ITM Gamma 0.009 Theta -0.149 Vega 0.017 Open interest 0 Model this call Put · $150 In the money Snapshot session Aug 13, 2026 Last $27.00 Breakeven $123.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this put
2	1	105.6%	0.062	$1.10		—	—	—	—	0
Call · $155 Snapshot session May 1, 2026 Last $1.10 Breakeven $156.10 Implied vol 105.6% Delta 0.062 ≈6% ITM Gamma 0.007 Theta -0.181 Vega 0.018 Open interest 2 Model this call Put · $155 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	131.6%	0.078	—		—	—	—	—	0
Call · $160 Snapshot session Unknown Last — Breakeven — Implied vol 131.6% Delta 0.078 ≈8% ITM Gamma 0.007 Theta -0.272 Vega 0.018 Open interest 0 Model this call Put · $160 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	129.3%	0.052	$0.95		—	—	—	—	0
Call · $165 Snapshot session Dec 23, 2025 Last $0.95 Breakeven $165.95 Implied vol 129.3% Delta 0.052 ≈5% ITM Gamma 0.005 Theta -0.193 Vega 0.018 Open interest 1 Model this call Put · $165 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 · Dec 23, 2025–Aug 13, 2026; 19 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 277509 CUSIP 313855108 13F (30d) 423 filings 418 filers Visit website Investor relations