Accident &Health Insurance

AFLAC Incorporated vs Principal Financial Group Inc

WatchlistAFL / PFGPrices through Nov 10, 2026

Why these are rivals: #1 and #2 by market value ($62B vs $24B) in Nasdaq's "Accident &Health Insurance" industry; SEC SIC 6321 / 6321 (same major group); #1 and #2 by market value ($62B vs $24B) with SEC SIC 6321 (Accident & Health Insurance).

Rivals, but right now the price gap does not have a measured habit of closing, so there is no paper idea, whatever the gap.

  • Co-movement: daily return correlation, 252 sessions: 0.42 (needs >= 0.60)
  • Mean reversion: ADF t-statistic of the spread: -2.18 (needs <= -2.873 (5% critical value))
Business leadership

AFL is the larger business

Annual revenue reported to the SEC. Scale, not market share.

YearAFLPFGLarger
2025$17.2B$15.6BAFL
2024$18.9B$16.1BAFL
2023$18.7B$13.7BAFL
2022$19.1B$17.5BAFL
2021$21.6B$14.4BAFL
2020$22.1B$14.7BAFL

AFL led in every year with figures for both. Market value: AFL $62.2B, PFG $23.9B.

Stock leadership

PFG is ahead now

Measured against the pair's own last 252 trading days.

PFG leads AFL by 0.63 standard deviations: +5.1% over its usual price ratio. 1 lead switch in the last year.

Price change3 mo6 mo12 mo
AFL+4.9%+9.0%+11.0%
PFG+2.0%+15.0%+40.0%
Relationship

Not a measured twin today

Only these tests can make a pair tradable on paper.

Pass
Aligned sessions: 2534 (needs >= 254)
Fail
Co-movement: daily return correlation, 252 sessions: 0.41 (needs >= 0.60)
Fail
Mean reversion: ADF t-statistic of the spread: -2.18 (needs <= -2.873 (5% critical value))
Pass
Speed: half-life of the spread, sessions: 26.18 (needs <= 63)
Data
Both stocks current
The twins over two years

Prices side by side, and the gap between them

AFL AFLAC Incorporated PFG Principal Financial Group IncPrice index, 100 = 2024-11-06. Tint = which stock is ahead of the pair's usual 1-year relationship (z beyond +/-0.5).
80100120140Nov 2024Nov 2025Nov 2026AFL 117PFG 135
Spread z-score: AFL relative to PFG, against the 252 sessions before each day. Above 0: AFL ahead; below 0: PFG ahead. Lines at +/-2 (idea) and +/-4 (stop).
-4stop-2idea0+2idea+4stopNov 2024Nov 2025Nov 2026
Data table (504 sessions)
DateAFL indexPFG indexzAhead
2026-11-10116.65134.65-0.63PFG ahead
2026-11-09115.35133.96-0.71PFG ahead
2026-11-06114.28128.76-0.34near the usual relationship
2026-11-05116.29130.97-0.34near the usual relationship
2026-11-04115.42136.19-0.92PFG ahead
2026-11-03114.26130.79-0.55PFG ahead
2026-11-02114.77130.96-0.52PFG ahead
2026-10-30114.12129.59-0.47near the usual relationship
2026-10-29113.80131.94-0.73PFG ahead
2026-10-28112.15129.84-0.72PFG ahead
2026-10-27112.37130.00-0.71PFG ahead
2026-10-26111.39127.85-0.62PFG ahead
2026-10-23111.01126.03-0.50PFG ahead
2026-10-22113.55127.83-0.40near the usual relationship
2026-10-21110.68125.89-0.53PFG ahead
2026-10-20110.79125.31-0.47near the usual relationship
2026-10-19109.31124.05-0.52PFG ahead
2026-10-16110.51126.32-0.61PFG ahead
2026-10-15108.74126.49-0.82PFG ahead
2026-10-14108.89124.52-0.63PFG ahead
2026-10-13107.26124.96-0.84PFG ahead
2026-10-12106.75125.19-0.92PFG ahead
2026-10-09105.51124.50-1.00PFG ahead
2026-10-08105.88127.43-1.23PFG ahead
2026-10-07103.85126.22-1.35PFG ahead
2026-10-06104.67127.35-1.37PFG ahead
2026-10-05103.52128.89-1.65PFG ahead
2026-10-02102.75129.97-1.84PFG ahead
2026-10-01102.41130.30-1.93PFG ahead
2026-09-30102.97129.97-1.85PFG ahead
2026-09-29104.70132.31-1.88PFG ahead
2026-09-28104.60133.09-1.98PFG ahead
2026-09-25104.75133.24-2.00PFG ahead
2026-09-24105.02132.52-1.93PFG ahead
2026-09-23106.14132.25-1.80PFG ahead
2026-09-22105.56131.87-1.85PFG ahead
2026-09-21106.10135.21-2.11PFG ahead
2026-09-18107.16136.60-2.13PFG ahead
2026-09-17107.41134.59-1.95PFG ahead
2026-09-16107.60135.41-2.03PFG ahead
2026-09-15108.28137.42-2.15PFG ahead
2026-09-14107.78135.71-2.08PFG ahead
2026-09-11106.19134.86-2.21PFG ahead
2026-09-10105.44133.46-2.20PFG ahead
2026-09-09105.69132.37-2.10PFG ahead
2026-09-08106.08133.55-2.19PFG ahead
2026-09-04107.97135.45-2.17PFG ahead
2026-09-03109.03137.58-2.27PFG ahead
2026-09-02108.00129.22-1.63PFG ahead
2026-09-01106.87126.96-1.56PFG ahead
2026-08-31106.72127.88-1.68PFG ahead
2026-08-28107.33129.34-1.77PFG ahead
2026-08-27107.39130.22-1.86PFG ahead
2026-08-26108.19130.26-1.79PFG ahead
2026-08-25107.02129.54-1.88PFG ahead
2026-08-24108.88129.89-1.71PFG ahead
2026-08-21106.92128.57-1.83PFG ahead
2026-08-20107.01128.33-1.81PFG ahead
2026-08-19107.32129.60-1.92PFG ahead
2026-08-18112.13131.34-1.54PFG ahead
2026-08-17111.44131.15-1.62PFG ahead
2026-08-14111.87132.32-1.70PFG ahead
2026-08-13111.55133.42-1.86PFG ahead
2026-08-12111.21132.08-1.78PFG ahead
2026-08-11111.52131.22-1.68PFG ahead
2026-08-10112.32132.12-1.69PFG ahead
2026-08-07114.78131.65-1.38PFG ahead
2026-08-06116.67133.98-1.41PFG ahead
2026-08-05115.66133.33-1.47PFG ahead
2026-08-04115.28133.79-1.57PFG ahead
2026-08-03116.72133.65-1.41PFG ahead
2026-07-31117.43131.99-1.18PFG ahead
2026-07-30117.32132.28-1.23PFG ahead
2026-07-29118.52131.39-1.01PFG ahead
2026-07-28119.33132.45-1.04PFG ahead
2026-07-27116.58129.20-1.02PFG ahead
2026-07-24115.70127.00-0.90PFG ahead
2026-07-23114.54124.59-0.79PFG ahead
2026-07-22113.84125.67-0.99PFG ahead
2026-07-21113.84127.20-1.16PFG ahead
2026-07-20114.30130.09-1.42PFG ahead
2026-07-17114.89132.28-1.59PFG ahead
2026-07-16113.32131.32-1.69PFG ahead
2026-07-15111.47131.14-1.91PFG ahead
2026-07-14112.43131.09-1.81PFG ahead
2026-07-13113.58131.89-1.78PFG ahead
2026-07-10112.30130.29-1.78PFG ahead
2026-07-09112.37129.64-1.72PFG ahead
2026-07-08111.86128.56-1.69PFG ahead
2026-07-07111.91131.04-1.97PFG ahead
2026-07-06110.97130.66-2.07PFG ahead
2026-07-02111.35128.71-1.83PFG ahead
2026-07-01109.15126.46-1.89PFG ahead
2026-06-30108.00125.12-1.91PFG ahead
2026-06-29110.61125.97-1.68PFG ahead
2026-06-26110.68125.09-1.58PFG ahead
2026-06-25108.91122.41-1.52PFG ahead
2026-06-24108.47123.87-1.77PFG ahead
2026-06-23109.42130.44-2.43PFG ahead
2026-06-22107.36129.13-2.60PFG ahead
2026-06-18106.37127.20-2.55PFG ahead
2026-06-17107.07127.95-2.59PFG ahead
2026-06-16108.15129.06-2.61PFG ahead
2026-06-15107.74128.38-2.63PFG ahead
2026-06-12108.51128.99-2.64PFG ahead
2026-06-11107.27127.34-2.66PFG ahead
2026-06-10107.88126.78-2.55PFG ahead
2026-06-09106.49123.82-2.41PFG ahead
2026-06-08106.15121.93-2.24PFG ahead
2026-06-05108.92122.15-1.87PFG ahead
2026-06-04106.20120.16-2.04PFG ahead
2026-06-03105.47117.47-1.80PFG ahead
2026-06-02104.67119.93-2.30PFG ahead
2026-06-01103.27119.46-2.50PFG ahead
2026-05-29103.56120.29-2.62PFG ahead
2026-05-28103.75119.94-2.58PFG ahead
2026-05-27105.79121.40-2.49PFG ahead
2026-05-26107.61121.56-2.25PFG ahead
2026-05-22108.57120.56-1.97PFG ahead
2026-05-21108.52120.64-2.01PFG ahead
2026-05-20107.98119.35-1.93PFG ahead
2026-05-19109.07117.41-1.47PFG ahead
2026-05-18109.31118.88-1.67PFG ahead
2026-05-15107.60116.71-1.64PFG ahead
2026-05-14107.21116.98-1.76PFG ahead
2026-05-13106.37116.58-1.87PFG ahead
2026-05-12107.00117.07-1.85PFG ahead
2026-05-11106.37116.31-1.86PFG ahead
2026-05-08104.18116.67-2.34PFG ahead
2026-05-07104.64116.12-2.19PFG ahead
2026-05-06104.46117.89-2.55PFG ahead
2026-05-05105.43117.10-2.27PFG ahead
2026-05-04104.39115.46-2.22PFG ahead
2026-05-01103.98117.36-2.63PFG ahead
2026-04-30104.71117.15-2.48PFG ahead
2026-04-29107.05115.66-1.81PFG ahead
2026-04-28107.12116.16-1.89PFG ahead
2026-04-27105.64115.79-2.10PFG ahead
2026-04-24105.58115.32-2.05PFG ahead
2026-04-23106.04112.61-1.52PFG ahead
2026-04-22105.70113.11-1.66PFG ahead
2026-04-21106.83111.13-1.14PFG ahead
2026-04-20105.63111.67-1.44PFG ahead
2026-04-17105.49111.64-1.46PFG ahead
2026-04-16104.74109.10-1.18PFG ahead
2026-04-15104.07109.91-1.43PFG ahead
2026-04-14103.11109.29-1.50PFG ahead
2026-04-13103.30108.60-1.37PFG ahead
2026-04-10101.97106.57-1.27PFG ahead
2026-04-09104.15107.17-1.01PFG ahead
2026-04-08104.09109.36-1.39PFG ahead
2026-04-07101.81105.71-1.19PFG ahead
2026-04-06101.57105.77-1.25PFG ahead
2026-04-02101.77104.60-1.02PFG ahead
2026-04-01100.99104.57-1.16PFG ahead
2026-03-31101.06104.61-1.17PFG ahead
2026-03-3099.64102.43-1.05PFG ahead
2026-03-2798.02101.01-1.10PFG ahead
2026-03-2699.68103.25-1.20PFG ahead
2026-03-2598.76103.00-1.33PFG ahead
2026-03-2497.83101.83-1.31PFG ahead
2026-03-2398.24100.48-0.99PFG ahead
2026-03-2097.8498.76-0.76PFG ahead
2026-03-1998.7299.72-0.78PFG ahead
2026-03-1899.41100.63-0.82PFG ahead
2026-03-17100.88101.85-0.77PFG ahead
2026-03-16100.51100.36-0.58PFG ahead
2026-03-13100.1499.64-0.51PFG ahead
2026-03-12100.99100.06-0.44near the usual relationship
2026-03-11100.71102.39-0.91PFG ahead
2026-03-10101.60104.17-1.06PFG ahead
2026-03-09101.49105.19-1.27PFG ahead
2026-03-06102.51107.10-1.42PFG ahead
2026-03-05102.28108.54-1.71PFG ahead
2026-03-04103.61108.54-1.48PFG ahead
2026-03-03103.56108.74-1.53PFG ahead
2026-03-02104.41111.25-1.81PFG ahead
2026-02-27104.03110.77-1.81PFG ahead
2026-02-26104.98113.19-2.06PFG ahead
2026-02-25103.57109.91-1.77PFG ahead
2026-02-24103.59110.11-1.81PFG ahead
2026-02-23103.49107.60-1.39PFG ahead
2026-02-20105.04111.17-1.73PFG ahead
2026-02-19103.87106.98-1.21PFG ahead
2026-02-18104.66107.33-1.13PFG ahead
2026-02-17106.32106.78-0.73PFG ahead
2026-02-13105.85104.93-0.48near the usual relationship
2026-02-12106.74105.07-0.35near the usual relationship
2026-02-11107.08107.74-0.75PFG ahead
2026-02-10106.74108.71-0.97PFG ahead
2026-02-09104.27111.37-1.88PFG ahead
2026-02-06107.91113.00-1.52PFG ahead
2026-02-05108.21110.87-1.12PFG ahead
2026-02-04104.66111.91-1.95PFG ahead
2026-02-03103.21110.62-2.02PFG ahead
2026-02-02103.12111.45-2.20PFG ahead
2026-01-30102.20109.96-2.14PFG ahead
2026-01-29101.80110.01-2.26PFG ahead
2026-01-28100.33109.18-2.43PFG ahead
2026-01-2799.83107.07-2.17PFG ahead
2026-01-26100.35107.96-2.26PFG ahead
2026-01-2398.65105.89-2.24PFG ahead
2026-01-2299.76106.98-2.25PFG ahead
2026-01-21100.00105.75-1.99PFG ahead
2026-01-20100.64102.79-1.27PFG ahead
2026-01-16100.88102.72-1.22PFG ahead
2026-01-15100.97105.62-1.80PFG ahead
2026-01-14101.49105.89-1.76PFG ahead
2026-01-1399.45103.34-1.69PFG ahead
2026-01-12100.29104.71-1.81PFG ahead
2026-01-09100.63104.82-1.78PFG ahead
2026-01-08101.57106.49-1.95PFG ahead
2026-01-07101.50105.50-1.78PFG ahead
2026-01-06103.13106.57-1.66PFG ahead
2026-01-05103.34105.07-1.32PFG ahead
2026-01-02101.55103.81-1.45PFG ahead
2025-12-31101.58102.40-1.15PFG ahead
2025-12-30102.06103.20-1.23PFG ahead
2025-12-29101.29103.37-1.44PFG ahead
2025-12-26101.23103.76-1.55PFG ahead
2025-12-24101.90104.01-1.47PFG ahead
2025-12-23101.99103.92-1.45PFG ahead
2025-12-22101.37103.60-1.53PFG ahead
2025-12-19101.66103.26-1.40PFG ahead
2025-12-18101.75103.71-1.49PFG ahead
2025-12-17101.79103.75-1.51PFG ahead
2025-12-16100.86103.95-1.78PFG ahead
2025-12-15102.71105.21-1.65PFG ahead
2025-12-12101.37104.41-1.79PFG ahead
2025-12-11100.27106.27-2.50PFG ahead
2025-12-1098.74104.75-2.55PFG ahead
2025-12-0999.50102.40-1.84PFG ahead
2025-12-0899.54100.86-1.47PFG ahead
2025-12-05100.66101.60-1.38PFG ahead
2025-12-04100.6399.76-0.95PFG ahead
2025-12-03100.4499.77-1.00PFG ahead
2025-12-02100.2597.89-0.59PFG ahead
2025-12-01100.9198.04-0.47near the usual relationship
2025-11-28101.6198.47-0.41near the usual relationship
2025-11-26101.8398.21-0.29near the usual relationship
2025-11-25102.8398.32-0.08near the usual relationship
2025-11-24101.6898.17-0.32near the usual relationship
2025-11-21102.2397.85-0.11near the usual relationship
2025-11-20101.8395.61+0.36near the usual relationship
2025-11-19100.7796.48-0.11near the usual relationship
2025-11-18102.9595.41+0.69AFL ahead
2025-11-17103.4294.04+1.16AFL ahead
2025-11-14105.3298.06+0.59AFL ahead
2025-11-13105.9498.24+0.69AFL ahead
2025-11-12105.5798.98+0.43near the usual relationship
2025-11-11104.8297.96+0.52AFL ahead
2025-11-10104.6297.03+0.71AFL ahead
2025-11-07105.0996.19+1.03AFL ahead
2025-11-06104.7395.70+1.08AFL ahead
2025-11-05102.4794.22+0.94AFL ahead
2025-11-04100.2395.26+0.14near the usual relationship
2025-11-0398.5496.38-0.55PFG ahead
2025-10-3198.7497.56-0.80PFG ahead
2025-10-3098.4296.05-0.50PFG ahead
2025-10-2997.3795.69-0.67PFG ahead
2025-10-2898.2795.43-0.38near the usual relationship
2025-10-2799.0792.37+0.61AFL ahead
2025-10-2498.7392.43+0.51AFL ahead
2025-10-2399.0792.22+0.66AFL ahead
2025-10-2299.3591.87+0.82AFL ahead
2025-10-2199.6592.16+0.82AFL ahead
2025-10-20100.1991.68+1.09AFL ahead
2025-10-1799.2291.28+0.97AFL ahead
2025-10-1698.3191.00+0.83AFL ahead
2025-10-15101.1593.92+0.76AFL ahead
2025-10-14102.7294.37+1.02AFL ahead
2025-10-13101.5792.49+1.24AFL ahead
2025-10-10102.2092.20+1.48AFL ahead
2025-10-09102.4095.99+0.56AFL ahead
2025-10-08103.0894.93+0.99AFL ahead
2025-10-07104.0397.02+0.69AFL ahead
2025-10-06104.1597.72+0.54AFL ahead
2025-10-03103.4697.79+0.37near the usual relationship
2025-10-02101.8897.82-0.01near the usual relationship
2025-10-01102.0296.40+0.38near the usual relationship
2025-09-30102.8996.25+0.63AFL ahead
2025-09-29102.5795.74+0.68AFL ahead
2025-09-26102.5895.91+0.65AFL ahead
2025-09-25100.8594.61+0.57AFL ahead
2025-09-24100.6995.01+0.44near the usual relationship
2025-09-2399.7095.66+0.04near the usual relationship
2025-09-2298.9395.44-0.09near the usual relationship
2025-09-1999.5294.86+0.20near the usual relationship
2025-09-1899.4894.94+0.17near the usual relationship
2025-09-17100.6293.87+0.71AFL ahead
2025-09-1699.1492.98+0.59AFL ahead
2025-09-1599.8696.30-0.09near the usual relationship
2025-09-12100.5396.01+0.14near the usual relationship
2025-09-11100.1295.29+0.22near the usual relationship
2025-09-1098.7792.95+0.48near the usual relationship
2025-09-0997.9092.95+0.27near the usual relationship
2025-09-0897.9692.54+0.39near the usual relationship
2025-09-0598.5092.85+0.44near the usual relationship
2025-09-0499.9994.38+0.40near the usual relationship
2025-09-0398.3293.08+0.33near the usual relationship
2025-09-0297.2992.80+0.15near the usual relationship
2025-08-2998.4393.46+0.26near the usual relationship
2025-08-2897.7393.13+0.17near the usual relationship
2025-08-2798.9493.85+0.28near the usual relationship
2025-08-2699.6393.51+0.52AFL ahead
2025-08-2598.9193.20+0.43near the usual relationship
2025-08-2299.9193.71+0.54AFL ahead
2025-08-2199.6691.33+1.09AFL ahead
2025-08-2099.3991.39+1.01AFL ahead
2025-08-1998.4691.25+0.83AFL ahead
2025-08-1897.4290.20+0.85AFL ahead
2025-08-1597.0790.13+0.78AFL ahead
2025-08-1497.0090.65+0.63AFL ahead
2025-08-1397.3790.94+0.64AFL ahead
2025-08-1295.3989.67+0.49near the usual relationship
2025-08-1195.9688.79+0.86AFL ahead
2025-08-0895.3688.91+0.68AFL ahead
2025-08-0794.2287.76+0.71AFL ahead
2025-08-0694.2489.17+0.34near the usual relationship
2025-08-0591.1288.37-0.24near the usual relationship
2025-08-0490.7988.09-0.24near the usual relationship
2025-08-0190.3687.68-0.23near the usual relationship
2025-07-3191.5390.35-0.60PFG ahead
2025-07-3090.8288.91-0.40near the usual relationship
2025-07-2992.8793.09-0.90PFG ahead
2025-07-2892.9393.32-0.91PFG ahead
2025-07-2595.2294.09-0.54PFG ahead
2025-07-2494.3793.26-0.52PFG ahead
2025-07-2394.7893.89-0.54PFG ahead
2025-07-2294.6093.10-0.39near the usual relationship
2025-07-2193.1591.41-0.31near the usual relationship
2025-07-1893.8094.10-0.70PFG ahead
2025-07-1793.4294.00-0.73PFG ahead
2025-07-1693.4492.66-0.45near the usual relationship
2025-07-1592.6992.15-0.47near the usual relationship
2025-07-1494.5793.97-0.45near the usual relationship
2025-07-1193.5693.30-0.49near the usual relationship
2025-07-1094.2294.73-0.62PFG ahead
2025-07-0993.8793.87-0.51PFG ahead
2025-07-0895.1094.59-0.41near the usual relationship
2025-07-0794.7793.09-0.20near the usual relationship
2025-07-0396.3294.03-0.09near the usual relationship
2025-07-0295.3693.46-0.14near the usual relationship
2025-07-0197.4493.84+0.14near the usual relationship
2025-06-3097.1492.21+0.38near the usual relationship
2025-06-2796.7991.93+0.37near the usual relationship
2025-06-2695.7291.01+0.36near the usual relationship
2025-06-2594.4089.46+0.42near the usual relationship
2025-06-2495.9590.47+0.51AFL ahead
2025-06-2396.5789.77+0.73AFL ahead
2025-06-2095.1588.94+0.65AFL ahead
2025-06-1894.5488.19+0.68AFL ahead
2025-06-1794.0488.00+0.65AFL ahead
2025-06-1694.6289.08+0.56AFL ahead
2025-06-1394.1288.11+0.65AFL ahead
2025-06-1294.5489.41+0.51AFL ahead
2025-06-1193.3688.80+0.43near the usual relationship
2025-06-1094.2189.11+0.52AFL ahead
2025-06-0994.4389.20+0.54AFL ahead
2025-06-0695.5089.35+0.68AFL ahead
2025-06-0594.1588.16+0.68AFL ahead
2025-06-0494.7288.62+0.69AFL ahead
2025-06-0395.8689.78+0.69AFL ahead
2025-06-0295.6289.35+0.72AFL ahead
2025-05-3095.3890.42+0.53AFL ahead
2025-05-2994.7091.19+0.33near the usual relationship
2025-05-2893.9590.17+0.38near the usual relationship
2025-05-2795.2691.58+0.37near the usual relationship
2025-05-2394.4589.40+0.57AFL ahead
2025-05-2294.3789.80+0.51AFL ahead
2025-05-2195.3889.81+0.65AFL ahead
2025-05-2097.2993.49+0.41near the usual relationship
2025-05-1998.0494.38+0.39near the usual relationship
2025-05-1698.4094.67+0.40near the usual relationship
2025-05-1597.4494.52+0.31near the usual relationship
2025-05-1495.7194.08+0.16near the usual relationship
2025-05-1396.7594.85+0.20near the usual relationship
2025-05-1297.2594.85+0.27near the usual relationship
2025-05-0997.6191.60+0.72AFL ahead
2025-05-0897.9291.53+0.76AFL ahead
2025-05-0798.5390.03+1.02AFL ahead
2025-05-0697.5588.62+1.09AFL ahead
2025-05-0597.4188.88+1.05AFL ahead
2025-05-0297.2189.19+1.00AFL ahead
2025-05-0195.3685.99+1.19AFL ahead
2025-04-30100.1186.08+1.72AFL ahead
2025-04-29100.0486.59+1.66AFL ahead
2025-04-2899.9485.76+1.76AFL ahead
2025-04-2599.4385.28+1.78AFL ahead
2025-04-24100.5387.07+1.69AFL ahead
2025-04-2399.8885.95+1.77AFL ahead
2025-04-2299.7784.57+1.94AFL ahead
2025-04-2196.6981.56+2.01AFL ahead
2025-04-1798.9783.75+1.99AFL ahead
2025-04-1698.8883.17+2.07AFL ahead
2025-04-1599.5184.85+1.94AFL ahead
2025-04-1499.9585.24+1.95AFL ahead
2025-04-1198.4184.29+1.92AFL ahead
2025-04-1096.4383.54+1.81AFL ahead
2025-04-0997.0089.70+1.12AFL ahead
2025-04-0891.9080.75+1.67AFL ahead
2025-04-0792.1183.18+1.39AFL ahead
2025-04-0493.9484.68+1.41AFL ahead
2025-04-03102.9492.08+1.50AFL ahead
2025-04-02103.42100.06+0.69AFL ahead
2025-04-01103.5898.85+0.84AFL ahead
2025-03-31102.4297.95+0.83AFL ahead
2025-03-28101.1496.42+0.86AFL ahead
2025-03-27102.0498.77+0.72AFL ahead
2025-03-26101.7399.37+0.63AFL ahead
2025-03-25101.0899.45+0.56AFL ahead
2025-03-24101.0098.97+0.61AFL ahead
2025-03-2199.7196.66+0.72AFL ahead
2025-03-20100.1397.67+0.67AFL ahead
2025-03-1999.9197.99+0.62AFL ahead
2025-03-1898.8996.63+0.66AFL ahead
2025-03-1799.8597.38+0.69AFL ahead
2025-03-1498.7996.10+0.72AFL ahead
2025-03-1396.8193.50+0.80AFL ahead
2025-03-1296.4495.23+0.59AFL ahead
2025-03-1197.8996.22+0.64AFL ahead
2025-03-1098.3497.14+0.60AFL ahead
2025-03-0799.8699.38+0.53AFL ahead
2025-03-0699.44100.58+0.39near the usual relationship
2025-03-0599.63101.07+0.36near the usual relationship
2025-03-0499.1299.40+0.48near the usual relationship
2025-03-03101.46102.90+0.38near the usual relationship
2025-02-28100.84103.37+0.29near the usual relationship
2025-02-2798.96101.61+0.28near the usual relationship
2025-02-2697.4799.72+0.32near the usual relationship
2025-02-2598.3199.09+0.46near the usual relationship
2025-02-2495.8898.80+0.26near the usual relationship
2025-02-2194.1097.96+0.18near the usual relationship
2025-02-2096.06100.49+0.14near the usual relationship
2025-02-1996.27100.06+0.21near the usual relationship
2025-02-1896.04100.53+0.15near the usual relationship
2025-02-1495.1999.43+0.17near the usual relationship
2025-02-1395.87100.94+0.11near the usual relationship
2025-02-1294.8298.61+0.22near the usual relationship
2025-02-1194.8799.20+0.18near the usual relationship
2025-02-1094.5297.96+0.26near the usual relationship
2025-02-0795.4195.58+0.56AFL ahead
2025-02-0694.9592.87+0.78AFL ahead
2025-02-0598.8393.53+1.07AFL ahead
2025-02-0498.3493.67+1.02AFL ahead
2025-02-0398.3094.00+0.99AFL ahead
2025-01-3198.9195.72+0.90AFL ahead
2025-01-3099.7196.95+0.87AFL ahead
2025-01-2999.1396.80+0.84AFL ahead
2025-01-2898.8296.23+0.87AFL ahead
2025-01-2799.6295.91+0.97AFL ahead
2025-01-2496.6495.00+0.80AFL ahead
2025-01-2396.2395.04+0.76AFL ahead
2025-01-2296.0894.80+0.78AFL ahead
2025-01-2198.0095.82+0.86AFL ahead
2025-01-1798.0994.80+0.97AFL ahead
2025-01-1697.5894.20+0.99AFL ahead
2025-01-1596.5392.96+1.02AFL ahead
2025-01-1495.4891.53+1.06AFL ahead
2025-01-1394.4190.32+1.09AFL ahead
2025-01-1093.0388.62+1.13AFL ahead
2025-01-0895.4090.93+1.14AFL ahead
2025-01-0794.7390.90+1.09AFL ahead
2025-01-0693.7690.34+1.06AFL ahead
2025-01-0395.0390.45+1.18AFL ahead
2025-01-0294.2989.84+1.18AFL ahead
2024-12-3195.2889.87+1.28AFL ahead
2024-12-3094.8589.66+1.27AFL ahead
2024-12-2795.2390.21+1.26AFL ahead
2024-12-2695.4990.94+1.22AFL ahead
2024-12-2495.1090.32+1.26AFL ahead
2024-12-2394.6489.85+1.27AFL ahead
2024-12-2094.5989.74+1.29AFL ahead
2024-12-1993.2787.28+1.42AFL ahead
2024-12-1892.4686.96+1.39AFL ahead
2024-12-1794.6590.02+1.30AFL ahead
2024-12-1695.6291.33+1.28AFL ahead
2024-12-1396.2891.61+1.32AFL ahead
2024-12-1296.1592.05+1.28AFL ahead
2024-12-1195.9992.69+1.21AFL ahead
2024-12-1096.0093.73+1.12AFL ahead
2024-12-0996.7295.81+1.00AFL ahead
2024-12-0698.8597.98+1.00AFL ahead
2024-12-0599.2597.23+1.11AFL ahead
2024-12-0498.5598.49+0.94AFL ahead
2024-12-0398.3498.44+0.93AFL ahead
2024-12-02102.6299.16+1.26AFL ahead
2024-11-29105.01101.10+1.30AFL ahead
2024-11-27105.10101.32+1.30AFL ahead
2024-11-26105.03100.75+1.35AFL ahead
2024-11-25104.27101.04+1.27AFL ahead
2024-11-22103.5399.52+1.35AFL ahead
2024-11-21102.9298.33+1.42AFL ahead
2024-11-20101.5597.69+1.37AFL ahead
2024-11-19102.3797.72+1.45AFL ahead
2024-11-18103.2199.92+1.33AFL ahead
2024-11-15102.54100.49+1.23AFL ahead
2024-11-14101.03100.26+1.12AFL ahead
2024-11-13101.73100.58+1.16AFL ahead
2024-11-12101.93101.13+1.13AFL ahead
2024-11-11101.72101.24+1.10AFL ahead
2024-11-0899.7399.20+1.12AFL ahead
2024-11-0798.9799.84+0.99AFL ahead
2024-11-06100.00100.00+1.08AFL ahead

One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Apr 3, 2025 (AFL -0.5%, PFG -8.0%); Apr 10, 2025 (AFL -0.6%, PFG -6.9%).

Paired trades

The shared paper book and the replay, kept apart

Forward paper record

No paper position on this pair yet.

Historical simulation (a diagnostic, same rules)

1 simulated trade to Nov 3, 2026: -7.03% per trade on average after costs, 0 won.

LegsEnteredExitedWhyDaysBefore costsCosts + borrowAfter costs
Long AFL · Short PFGSep 24, 2021Nov 23, 2021divergence stop60-$617.85-$75.56-$703.17 (-7.03%)

Per $10,000 a leg. A replay on today's companies cannot prove an edge.

The companies

AFL and PFG at a glance

AFL AFLAC Incorporated

Listing
NYSE · SEC CIK 4977
Industry
Accident &Health Insurance · SIC 6321 Accident & Health Insurance
Market value
$62.2B
Price history
2,534 daily closes, Oct 12, 2016 to Nov 10, 2026

PFG Principal Financial Group Inc

Listing
Nasdaq · SEC CIK 1126328
Industry
Accident &Health Insurance · SIC 6321 Accident & Health Insurance
Market value
$23.9B
Price history
2,534 daily closes, Oct 12, 2016 to Nov 10, 2026

Daily prices: Nasdaq.com. Filings and industry codes: SEC EDGAR. Earnings dates: Nasdaq earnings calendar.

Related
All pairs →
PairStatusAhead nowIndustry
PFG / UNMWatchlistPFG by 3.00 sdAccident &Health Insurance
AFL / UNMWatchlistAFL by 1.53 sdAccident &Health Insurance

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Paper only: hypothetical paired positions with modelled costs. No broker, no orders, no real money. A historical simulation is a diagnostic, not proof of an edge. Not investment advice.