NHC · National Healthcare Corp

Track NHC — free Ask ALVIS about NHC

$228.26 -2.75 (-1.19%) At close · Jul 29

Market Cap

$3.61B

15.62M

Options Chain

15-min delayed Underlying $228.26 · today Options Calculator

Positioning

Aug 21, 2026 · 22 days to expiry · 62 contracts

Put / call OI

0.47

Call-heavy positioning

Open interest

157

contracts outstanding

Volume

127

traded today

Max pain

$165.00

$63.26 below spot

ATM implied vol

40.6%

market's expected move

Open interest by strike · near the money

Calls Puts

100

105

110

115

120

125

130

135

140

145

150

155

160

165

170

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180

185

190

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270

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 22d Sep 18 50d Nov 20 113d Feb 19 204d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	1	156.3%	0.997	$104.50		$0.30	—	—	5	5
Call · $85 In the money Last $104.50 Breakeven $189.50 Implied vol 156.3% Delta 0.997 ≈100% ITM Gamma 0 Theta -0.016 Vega 0.007 Open interest 0 Model this call Put · $85 Last $0.30 Breakeven $84.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 Model this put
0	—	146.7%	0.997	—		—	—	—	—	0
Call · $90 In the money Last — Breakeven — Implied vol 146.7% Delta 0.997 ≈100% ITM Gamma 0 Theta -0.016 Vega 0.008 Open interest 0 Model this call Put · $90 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	137.6%	0.997	—		—	—	—	—	0
Call · $95 In the money Last — Breakeven — Implied vol 137.6% Delta 0.997 ≈100% ITM Gamma 0 Theta -0.015 Vega 0.008 Open interest 0 Model this call Put · $95 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	1	127.9%	0.997	$124.25		—	—	—	—	0
Call · $100 In the money Last $124.25 Breakeven $224.25 Implied vol 127.9% Delta 0.997 ≈100% ITM Gamma 0 Theta -0.013 Vega 0.003 Open interest 2 Model this call Put · $100 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	126.3%	0.995	—		—	—	—	—	0
Call · $105 In the money Last — Breakeven — Implied vol 126.3% Delta 0.995 ≈100% ITM Gamma 0 Theta -0.02 Vega 0.008 Open interest 0 Model this call Put · $105 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	118.1%	0.996	—		—	-0.01	137.6%	—	0
Call · $110 In the money Last — Breakeven — Implied vol 118.1% Delta 0.996 ≈100% ITM Gamma 0 Theta -0.019 Vega 0.009 Open interest 0 Model this call Put · $110 Last — Breakeven — Implied vol 137.6% Delta -0.01 ≈1% ITM Gamma 0 Theta -0.045 Vega 0.02 Open interest 0 Model this put
0	—	110.1%	0.996	—		—	-0.012	132.3%	—	0
Call · $115 In the money Last — Breakeven — Implied vol 110.1% Delta 0.996 ≈100% ITM Gamma 0 Theta -0.018 Vega 0.009 Open interest 0 Model this call Put · $115 Last — Breakeven — Implied vol 132.3% Delta -0.012 ≈1% ITM Gamma 0 Theta -0.05 Vega 0.02 Open interest 0 Model this put
0	—	102.5%	0.996	—		—	-0.011	122.4%	—	0
Call · $120 In the money Last — Breakeven — Implied vol 102.5% Delta 0.996 ≈100% ITM Gamma 0 Theta -0.016 Vega 0.009 Open interest 0 Model this call Put · $120 Last — Breakeven — Implied vol 122.4% Delta -0.011 ≈1% ITM Gamma 0 Theta -0.044 Vega 0.021 Open interest 0 Model this put
0	—	100.6%	0.994	—		—	-0.012	115.2%	—	0
Call · $125 In the money Last — Breakeven — Implied vol 100.6% Delta 0.994 ≈99% ITM Gamma 0 Theta -0.022 Vega 0.009 Open interest 0 Model this call Put · $125 Last — Breakeven — Implied vol 115.2% Delta -0.012 ≈1% ITM Gamma 0 Theta -0.044 Vega 0.021 Open interest 0 Model this put
0	—	98.8%	0.992	—		—	-0.012	108.4%	—	0
Call · $130 In the money Last — Breakeven — Implied vol 98.8% Delta 0.992 ≈99% ITM Gamma 0 Theta -0.028 Vega 0.009 Open interest 0 Model this call Put · $130 Last — Breakeven — Implied vol 108.4% Delta -0.012 ≈1% ITM Gamma 0.001 Theta -0.043 Vega 0.022 Open interest 0 Model this put
0	—	0.1%	0.999	—		—	-0.013	101.8%	—	0
Call · $135 In the money Last — Breakeven — Implied vol 0.1% Delta 0.999 ≈100% ITM Gamma 0 Theta -0.005 Vega 0 Open interest 0 Model this call Put · $135 Last — Breakeven — Implied vol 101.8% Delta -0.013 ≈1% ITM Gamma 0.001 Theta -0.043 Vega 0.022 Open interest 0 Model this put
0	—	0.1%	0.999	—		—	-0.014	95.5%	—	0
Call · $140 In the money Last — Breakeven — Implied vol 0.1% Delta 0.999 ≈100% ITM Gamma 0 Theta -0.005 Vega 0 Open interest 0 Model this call Put · $140 Last — Breakeven — Implied vol 95.5% Delta -0.014 ≈1% ITM Gamma 0.001 Theta -0.042 Vega 0.022 Open interest 0 Model this put
1	1	0.1%	0.999	$19.67		—	-0.015	89.4%	—	0
Call · $145 In the money Last $19.67 Breakeven $164.67 Implied vol 0.1% Delta 0.999 ≈100% ITM Gamma 0 Theta -0.006 Vega 0 Open interest 1 Model this call Put · $145 Last — Breakeven — Implied vol 89.4% Delta -0.015 ≈1% ITM Gamma 0.001 Theta -0.042 Vega 0.023 Open interest 0 Model this put
0	—	0.1%	0.999	—		$5.90	-0.016	83.5%	7	8
Call · $150 In the money Last — Breakeven — Implied vol 0.1% Delta 0.999 ≈100% ITM Gamma 0 Theta -0.006 Vega 0 Open interest 0 Model this call Put · $150 Last $5.90 Breakeven $144.10 Implied vol 83.5% Delta -0.016 ≈2% ITM Gamma 0.001 Theta -0.041 Vega 0.023 Open interest 8 Model this put
0	—	0.1%	0.999	—		—	-0.019	79.9%	—	0
Call · $155 In the money Last — Breakeven — Implied vol 0.1% Delta 0.999 ≈100% ITM Gamma 0 Theta -0.007 Vega 0 Open interest 0 Model this call Put · $155 Last — Breakeven — Implied vol 79.9% Delta -0.019 ≈2% ITM Gamma 0.001 Theta -0.047 Vega 0.024 Open interest 0 Model this put
0	—	0.1%	0.999	—		—	-0.018	72.3%	—	0
Call · $160 In the money Last — Breakeven — Implied vol 0.1% Delta 0.999 ≈100% ITM Gamma 0 Theta -0.007 Vega 0 Open interest 0 Model this call Put · $160 Last — Breakeven — Implied vol 72.3% Delta -0.018 ≈2% ITM Gamma 0.001 Theta -0.04 Vega 0.024 Open interest 0 Model this put
60	60	59.2%	0.99	$11.00		—	-0.022	69%	—	0
Call · $165 In the money Last $11.00 Breakeven $176.00 Implied vol 59.2% Delta 0.99 ≈99% ITM Gamma 0.001 Theta -0.027 Vega 0.01 Open interest 60 Model this call Put · $165 Last — Breakeven — Implied vol 69% Delta -0.022 ≈2% ITM Gamma 0.001 Theta -0.046 Vega 0.024 Open interest 0 Model this put
0	—	64%	0.975	—		—	-0.021	61.8%	—	0
Call · $170 In the money Last — Breakeven — Implied vol 64% Delta 0.975 ≈98% ITM Gamma 0.002 Theta -0.054 Vega 0.025 Open interest 0 Model this call Put · $170 Last — Breakeven — Implied vol 61.8% Delta -0.021 ≈2% ITM Gamma 0.001 Theta -0.039 Vega 0.025 Open interest 0 Model this put
14	10	0.1%	0.999	$13.06		$3.70	-0.023	56.8%	17	36
Call · $175 In the money Last $13.06 Breakeven $188.06 Implied vol 0.1% Delta 0.999 ≈100% ITM Gamma 0 Theta -0.009 Vega 0 Open interest 14 Model this call Put · $175 Last $3.70 Breakeven $171.30 Implied vol 56.8% Delta -0.023 ≈2% ITM Gamma 0.002 Theta -0.039 Vega 0.025 Open interest 36 Model this put
4	4	54.8%	0.966	$11.25		—	-0.028	53.1%	—	0
Call · $180 In the money Last $11.25 Breakeven $191.25 Implied vol 54.8% Delta 0.966 ≈97% ITM Gamma 0.002 Theta -0.059 Vega 0.051 Open interest 4 Model this call Put · $180 Last — Breakeven — Implied vol 53.1% Delta -0.028 ≈3% ITM Gamma 0.002 Theta -0.043 Vega 0.051 Open interest 0 Model this put
0	—	42.2%	0.981	—		—	-0.038	50.2%	—	0
Call · $185 In the money Last — Breakeven — Implied vol 42.2% Delta 0.981 ≈98% ITM Gamma 0.002 Theta -0.033 Vega 0.026 Open interest 0 Model this call Put · $185 Last — Breakeven — Implied vol 50.2% Delta -0.038 ≈4% ITM Gamma 0.003 Theta -0.052 Vega 0.051 Open interest 0 Model this put
1	1	50.4%	0.941	$6.05		—	-0.051	47.8%	—	0
Call · $190 In the money Last $6.05 Breakeven $196.05 Implied vol 50.4% Delta 0.941 ≈94% ITM Gamma 0.004 Theta -0.084 Vega 0.052 Open interest 1 Model this call Put · $190 Last — Breakeven — Implied vol 47.8% Delta -0.051 ≈5% ITM Gamma 0.004 Theta -0.063 Vega 0.052 Open interest 0 Model this put
1	1	43.9%	0.938	$18.60		—	-0.127	60.8%	—	0
Call · $195 In the money Last $18.60 Breakeven $213.60 Implied vol 43.9% Delta 0.938 ≈94% ITM Gamma 0.005 Theta -0.077 Vega 0.091 Open interest 1 Model this call Put · $195 Last — Breakeven — Implied vol 60.8% Delta -0.127 ≈13% ITM Gamma 0.006 Theta -0.158 Vega 0.138 Open interest 0 Model this put
4	2	42.2%	0.908	$14.75		—	-0.095	43.2%	—	0
Call · $200 In the money Last $14.75 Breakeven $214.75 Implied vol 42.2% Delta 0.908 ≈91% ITM Gamma 0.007 Theta -0.097 Vega 0.093 Open interest 4 Model this call Put · $200 Last — Breakeven — Implied vol 43.2% Delta -0.095 ≈10% ITM Gamma 0.007 Theta -0.091 Vega 0.093 Open interest 0 Model this put
2	3	41.4%	0.813	$5.97		—	-0.184	40.7%	—	0
Call · $210 In the money Last $5.97 Breakeven $215.97 Implied vol 41.4% Delta 0.813 ≈81% ITM Gamma 0.011 Theta -0.15 Vega 0.143 Open interest 2 Model this call Put · $210 Last — Breakeven — Implied vol 40.7% Delta -0.184 ≈18% ITM Gamma 0.012 Theta -0.134 Vega 0.143 Open interest 0 Model this put
0	1	41.4%	0.67	$0.95		$9.70	-0.331	41.9%	2	1
Call · $220 In the money Last $0.95 Breakeven $220.95 Implied vol 41.4% Delta 0.67 ≈67% ITM Gamma 0.016 Theta -0.2 Vega 0.193 Open interest 0 Model this call Put · $220 Last $9.70 Breakeven $210.30 Implied vol 41.9% Delta -0.331 ≈33% ITM Gamma 0.016 Theta -0.19 Vega 0.195 Open interest 1 Model this put
Underlying $228.26
2	3	40.9%	0.503	$8.45		—	-0.499	40.3%	—	0
Call · $230 Last $8.45 Breakeven $238.45 Implied vol 40.9% Delta 0.503 ≈50% ITM Gamma 0.017 Theta -0.214 Vega 0.227 Open interest 2 Model this call Put · $230 In the money Last — Breakeven — Implied vol 40.3% Delta -0.499 ≈50% ITM Gamma 0.018 Theta -0.197 Vega 0.227 Open interest 0 Model this put
8	1	42.5%	0.348	$4.04		—	-0.667	39.6%	—	0
Call · $240 Last $4.04 Breakeven $244.04 Implied vol 42.5% Delta 0.348 ≈35% ITM Gamma 0.015 Theta -0.203 Vega 0.204 Open interest 8 Model this call Put · $240 In the money Last — Breakeven — Implied vol 39.6% Delta -0.667 ≈67% ITM Gamma 0.016 Theta -0.173 Vega 0.203 Open interest 0 Model this put
8	7	41%	0.21	$4.60		—	-0.793	41%	—	0
Call · $250 Last $4.60 Breakeven $254.60 Implied vol 41% Delta 0.21 ≈21% ITM Gamma 0.012 Theta -0.152 Vega 0.16 Open interest 8 Model this call Put · $250 In the money Last — Breakeven — Implied vol 41% Delta -0.793 ≈79% ITM Gamma 0.013 Theta -0.138 Vega 0.159 Open interest 0 Model this put
0	—	41.2%	0.118	—		—	-0.917	36.9%	—	0
Call · $260 Last — Breakeven — Implied vol 41.2% Delta 0.118 ≈12% ITM Gamma 0.008 Theta -0.104 Vega 0.109 Open interest 0 Model this call Put · $260 In the money Last — Breakeven — Implied vol 36.9% Delta -0.917 ≈92% ITM Gamma 0.008 Theta -0.062 Vega 0.102 Open interest 0 Model this put
0	—	39.3%	0.051	—		—	-0.952	40.2%	—	0
Call · $270 Last — Breakeven — Implied vol 39.3% Delta 0.051 ≈5% ITM Gamma 0.005 Theta -0.052 Vega 0.065 Open interest 0 Model this call Put · $270 In the money Last — Breakeven — Implied vol 40.2% Delta -0.952 ≈95% ITM Gamma 0.005 Theta -0.042 Vega 0.058 Open interest 0 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. 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. The 17 strikes around the money are shown by default — switch to "All 31" for the wings. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1047335 CUSIP 635906100 13F (30d) 65 filings 57 filers Visit website