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Bel Fuse Inc. Class B Common Stock BELFB

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Market datapartial · fetched 2026-10-22T23:09:52.753Z

Delta surfaceAlpaca · derived absolute-delta buckets · 2026-11-20

Calculation methodology

Options historyIV: ThetaData historical Greeks, equal-weight mean of call/put 50-delta IV across the next four listed Friday-cycle expirations, including holiday shifts verified against ThetaData’s market calendar. Missing inputs leave gaps. Skew and implied move: recorded expiration-specific observations.

History data

PriceAlpaca · sip · 2026-10-22T20:00:00.651699493Z

FundamentalsAlpha Vantage · unavailable

Share price$199.81
1D-5.5%
AH$199$202$205$209$2125:30 AM6:30 AM9:00 AM1:00 PM2:00 PMBELFB
Sold putSold callAH

Bel Fuse Inc. Class B Common Stock options

Live interpolated BELFB call and put midpoint premiums by absolute delta.Bel Fuse Inc. Class B Common Stock$4.01$13.35$22.69$32.03$41.38$152.10$182.41$212.72$243.03$273.3420Δ25Δ30Δ35Δ40Δ45Δ50Δ55Δ60Δ65Δ70Δ75Δ80ΔOPTION PRICELive BELFB spot · $199.81BELFB PRICE$5.02$5.20$6.48$8.01$9.96$11.91$13.97$16.11$18.92$22.28$25.49$29.51$34.33$5.02$5.73$7.70$9.54$11.83$13.70$16.30$19.09$21.95$24.85$28.70$33.43$38.68
PutsFair1.02×
CallsExpensive1.40×
SkewBullish-7.85 pp
Implied moveBearish±$30.27
TiltBearish6.6% PUT
Table
Values and derived Greeks for the plotted delta buckets
DeltaCallsPuts
Pseudo strikeIVB/E movePseudo strikeIVB/E move
20Δ256.2489.8%30.8%172.3172.5%16.3%
25Δ232.5868.1%19.0%180.9261.9%12.3%
30Δ224.9965.9%15.8%185.1465.0%11.2%
35Δ219.2366.4%13.7%189.9664.8%9.7%
40Δ214.3668.2%12.3%194.5565.9%8.6%
45Δ209.4769.7%10.8%199.1364.0%7.2%
50Δ204.4069.5%9.3%203.7963.8%6.2%
55Δ199.3469.5%7.8%208.4764.1%5.2%
60Δ194.3671.0%6.7%213.1263.3%4.3%
65Δ189.0873.3%5.8%217.7662.1%3.5%
70Δ183.7173.3%4.7%223.1261.7%2.7%
75Δ177.8274.3%3.8%229.1462.2%2.0%
80Δ171.3175.7%2.9%235.6261.4%1.4%

20Δ

Calls
Pseudo strike
256.24
IV
89.8%
B/E move
30.8%
Puts
Pseudo strike
172.31
IV
72.5%
B/E move
16.3%

25Δ

Calls
Pseudo strike
232.58
IV
68.1%
B/E move
19.0%
Puts
Pseudo strike
180.92
IV
61.9%
B/E move
12.3%

30Δ

Calls
Pseudo strike
224.99
IV
65.9%
B/E move
15.8%
Puts
Pseudo strike
185.14
IV
65.0%
B/E move
11.2%

35Δ

Calls
Pseudo strike
219.23
IV
66.4%
B/E move
13.7%
Puts
Pseudo strike
189.96
IV
64.8%
B/E move
9.7%

40Δ

Calls
Pseudo strike
214.36
IV
68.2%
B/E move
12.3%
Puts
Pseudo strike
194.55
IV
65.9%
B/E move
8.6%

45Δ

Calls
Pseudo strike
209.47
IV
69.7%
B/E move
10.8%
Puts
Pseudo strike
199.13
IV
64.0%
B/E move
7.2%

50Δ

Calls
Pseudo strike
204.40
IV
69.5%
B/E move
9.3%
Puts
Pseudo strike
203.79
IV
63.8%
B/E move
6.2%

55Δ

Calls
Pseudo strike
199.34
IV
69.5%
B/E move
7.8%
Puts
Pseudo strike
208.47
IV
64.1%
B/E move
5.2%

60Δ

Calls
Pseudo strike
194.36
IV
71.0%
B/E move
6.7%
Puts
Pseudo strike
213.12
IV
63.3%
B/E move
4.3%

65Δ

Calls
Pseudo strike
189.08
IV
73.3%
B/E move
5.8%
Puts
Pseudo strike
217.76
IV
62.1%
B/E move
3.5%

70Δ

Calls
Pseudo strike
183.71
IV
73.3%
B/E move
4.7%
Puts
Pseudo strike
223.12
IV
61.7%
B/E move
2.7%

75Δ

Calls
Pseudo strike
177.82
IV
74.3%
B/E move
3.8%
Puts
Pseudo strike
229.14
IV
62.2%
B/E move
2.0%

80Δ

Calls
Pseudo strike
171.31
IV
75.7%
B/E move
2.9%
Puts
Pseudo strike
235.62
IV
61.4%
B/E move
1.4%

Options history

BELFB59.1759.2859.392026-10-20: 59.23%2026-10-21: 59.33%Oct 20Oct 21
Table
DateIV
59.23%
59.33%