SO Moves

The Southern Company SO 93.34 0.22 0.24%

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Expected move

November 05, 2026 close · $93.45

Horizon	Expected move	Typical range	2 in 3 closes	9 in 10 closes
Next session	±1.2% ±$1.15	$92.30 – $94.60	$92.07 – $94.83	$90.98 – $95.92
2 sessions	±1.7% ±$1.60	$91.85 – $95.05	$91.52 – $95.38	$90.00 – $96.90
3 sessions	±2.1% ±$2.01	$91.44 – $95.46	$91.05 – $95.85	$89.16 – $97.74
1 week	±2.7% ±$2.56	$90.89 – $96.01	$90.32 – $96.58	$88.00 – $98.90
2 weeks	±3.6% ±$3.33	$90.12 – $96.78	$89.34 – $97.56	$86.36 – $100.54
3 weeks	±4.2% ±$3.96	$89.49 – $97.41	$88.53 – $98.37	$85.08 – $101.82
1 month	±4.7% ±$4.38	$89.07 – $97.83	$87.97 – $98.93	$84.15 – $102.75

Size, not direction. The 68% and 90% bands held 66–68% and 89–90% of closes in held-out years 2019–2026. Draw the cone on the chart →

Volatility premium

Beta

The forecast is for the current session, which this plan does not open.

Earnings: priced against what happened

Average implied move

±2.30%

Average actual move

1.48%

Beyond the implied move

1 / 6

Median IV change

-12.47%

Reaction session	Implied	Actual	Used	ATM IV before → after
November 05, 2026	±2.23%	+0.24%	0.11×	23.0% → 25.4%
July 30, 2026	±2.21%	-1.78%	0.80×	—
February 19, 2026	±2.61%	+4.40%	1.69×	—
July 31, 2025	±2.11%	-0.44%	0.21×	21.1% → 16.4%
May 01, 2025	±2.26%	-0.47%	0.21×	23.5% → 21.1%
February 20, 2025	±2.40%	+1.55%	0.65×	21.7% → 18.5%

Reconstructed from archived mid quotes; the straddle covers its expiration, not only the reaction session. These are not option returns. Method and missing reports →