SIC 3510 Engines & Turbines

BWX Technologies Inc. vs Cummins Inc.

WatchlistBWXT / CMIPrices through Oct 22, 2026

Why these are rivals: #1 and #2 by market value ($72B vs $12B) with SEC SIC 3510 (Engines & Turbines).

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: 0.53 (needs >= 0.60)
  • Mean reversion: ADF t-statistic of the spread: -1.77 (needs <= -2.873 (5% critical value))
Business leadership

CMI is the larger business

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

YearBWXTCMILarger
2025$3.2B$33.7BCMI
2024$2.7B$34.1BCMI
2023$2.5B$34.1BCMI
2022$2.2B$28.1BCMI
2021$2.1B$24.0BCMI
2020$2.1B$19.8BCMI

CMI led in every year with figures for both. Market value: BWXT $12.4B, CMI $71.9B.

Stock leadership

CMI is ahead now

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

CMI leads BWXT by 1.65 standard deviations: +31.6% over its usual price ratio. 1 lead switch in the last year.

Price change3 mo6 mo12 mo
BWXT-27.1%-43.6%-38.0%
CMI-21.8%-20.9%+24.3%
Relationship

Not a measured twin today

Only these tests can make a pair tradable on paper.

Pass
Aligned sessions: 2521 (needs >= 254)
Fail
Co-movement: daily return correlation, 252 sessions: 0.53 (needs >= 0.60)
Fail
Mean reversion: ADF t-statistic of the spread: -1.77 (needs <= -2.873 (5% critical value))
Pass
Speed: half-life of the spread, sessions: 34.60 (needs <= 63)
Data
Both stocks current
The twins over two years

Prices side by side, and the gap between them

BWXT BWX Technologies Inc. CMI Cummins Inc.Price index, 100 = 2024-10-18. Tint = which stock is ahead of the pair's usual 1-year relationship (z beyond +/-0.5).
100150200Oct 2024Oct 2025Oct 2026BWXT 101CMI 155
Spread z-score: BWXT relative to CMI, against the 252 sessions before each day. Above 0: BWXT ahead; below 0: CMI ahead. Lines at +/-2 (idea) and +/-4 (stop).
-4stop-2idea0+2idea+4stopOct 2024Oct 2025Oct 2026
Data table (504 sessions)
DateBWXT indexCMI indexzAhead
2026-10-22100.86154.85-1.65CMI ahead
2026-10-21107.05161.61-1.56CMI ahead
2026-10-20106.36159.82-1.53CMI ahead
2026-10-19107.62155.62-1.31CMI ahead
2026-10-16108.56158.36-1.36CMI ahead
2026-10-15108.71158.78-1.38CMI ahead
2026-10-14106.52156.76-1.43CMI ahead
2026-10-13110.02157.77-1.28CMI ahead
2026-10-12110.86157.33-1.23CMI ahead
2026-10-09113.96156.00-1.03CMI ahead
2026-10-08112.69155.11-1.07CMI ahead
2026-10-07112.15154.19-1.07CMI ahead
2026-10-06115.44159.55-1.11CMI ahead
2026-10-05107.24155.99-1.41CMI ahead
2026-10-02106.85157.47-1.49CMI ahead
2026-10-01108.38154.09-1.30CMI ahead
2026-09-30108.55153.97-1.30CMI ahead
2026-09-29109.35155.40-1.32CMI ahead
2026-09-28106.45154.34-1.44CMI ahead
2026-09-25109.71156.50-1.36CMI ahead
2026-09-24109.88155.31-1.32CMI ahead
2026-09-23112.36156.37-1.24CMI ahead
2026-09-22114.50156.81-1.16CMI ahead
2026-09-21116.84159.39-1.15CMI ahead
2026-09-18116.88158.63-1.13CMI ahead
2026-09-17115.96156.14-1.10CMI ahead
2026-09-16115.41157.22-1.17CMI ahead
2026-09-15116.23160.36-1.25CMI ahead
2026-09-14117.68161.28-1.22CMI ahead
2026-09-11118.94165.94-1.33CMI ahead
2026-09-10120.82163.94-1.19CMI ahead
2026-09-09124.17165.35-1.09CMI ahead
2026-09-08127.10167.37-1.04CMI ahead
2026-09-04124.86167.13-1.14CMI ahead
2026-09-03126.97162.59-0.89CMI ahead
2026-09-02123.34164.20-1.12CMI ahead
2026-09-01127.99164.27-0.92CMI ahead
2026-08-31120.66168.22-1.40CMI ahead
2026-08-28121.11168.36-1.40CMI ahead
2026-08-27123.48171.04-1.39CMI ahead
2026-08-26121.35172.32-1.55CMI ahead
2026-08-25118.64170.69-1.64CMI ahead
2026-08-24118.47170.37-1.65CMI ahead
2026-08-21124.22175.16-1.55CMI ahead
2026-08-20123.95176.82-1.63CMI ahead
2026-08-19128.56181.33-1.58CMI ahead
2026-08-18130.74185.03-1.62CMI ahead
2026-08-17135.92191.10-1.59CMI ahead
2026-08-14137.25188.15-1.46CMI ahead
2026-08-13134.97188.25-1.57CMI ahead
2026-08-12136.72190.11-1.57CMI ahead
2026-08-11134.47188.65-1.63CMI ahead
2026-08-10133.81189.21-1.69CMI ahead
2026-08-07134.62192.02-1.76CMI ahead
2026-08-06132.08191.94-1.88CMI ahead
2026-08-05133.33193.81-1.90CMI ahead
2026-08-04136.60189.55-1.65CMI ahead
2026-08-03137.70193.39-1.74CMI ahead
2026-07-31133.67189.03-1.80CMI ahead
2026-07-30131.20188.66-1.92CMI ahead
2026-07-29124.74180.62-1.98CMI ahead
2026-07-28134.43191.23-1.90CMI ahead
2026-07-27139.87197.26-1.87CMI ahead
2026-07-24138.28198.10-1.99CMI ahead
2026-07-23139.98198.21-1.94CMI ahead
2026-07-22138.79196.94-1.98CMI ahead
2026-07-21137.14196.85-2.07CMI ahead
2026-07-20134.35190.58-2.03CMI ahead
2026-07-17135.63193.28-2.08CMI ahead
2026-07-16137.66193.09-2.00CMI ahead
2026-07-15140.17198.54-2.09CMI ahead
2026-07-14142.48201.35-2.11CMI ahead
2026-07-13140.35198.02-2.12CMI ahead
2026-07-10147.37201.47-1.94CMI ahead
2026-07-09148.16200.71-1.90CMI ahead
2026-07-08145.88199.46-1.99CMI ahead
2026-07-07147.44196.76-1.84CMI ahead
2026-07-06156.00202.15-1.66CMI ahead
2026-07-02151.38197.22-1.72CMI ahead
2026-07-01151.53203.37-1.94CMI ahead
2026-06-30154.23212.57-2.15CMI ahead
2026-06-29149.95205.98-2.15CMI ahead
2026-06-26156.81204.43-1.81CMI ahead
2026-06-25162.25216.86-2.00CMI ahead
2026-06-24162.94207.11-1.67CMI ahead
2026-06-23166.30208.35-1.58CMI ahead
2026-06-22166.39216.07-1.85CMI ahead
2026-06-18162.74213.66-1.95CMI ahead
2026-06-17160.90213.94-2.07CMI ahead
2026-06-16156.03208.63-2.13CMI ahead
2026-06-15153.66202.59-2.06CMI ahead
2026-06-12153.28196.59-1.88CMI ahead
2026-06-11154.25195.43-1.81CMI ahead
2026-06-10145.00187.93-2.00CMI ahead
2026-06-09149.72199.47-2.24CMI ahead
2026-06-08148.53200.49-2.37CMI ahead
2026-06-05147.33194.10-2.22CMI ahead
2026-06-04151.14202.11-2.37CMI ahead
2026-06-03146.36203.37-2.71CMI ahead
2026-06-02148.37200.49-2.54CMI ahead
2026-06-01149.27191.80-2.17CMI ahead
2026-05-29155.20192.73-1.92CMI ahead
2026-05-28157.89199.30-2.08CMI ahead
2026-05-27157.63199.06-2.10CMI ahead
2026-05-26161.94199.32-1.91CMI ahead
2026-05-22160.77190.62-1.61CMI ahead
2026-05-21160.46190.39-1.62CMI ahead
2026-05-20160.57199.66-2.01CMI ahead
2026-05-19156.35196.55-2.12CMI ahead
2026-05-18160.00202.04-2.17CMI ahead
2026-05-15162.21207.60-2.30CMI ahead
2026-05-14167.13213.54-2.30CMI ahead
2026-05-13163.88211.49-2.40CMI ahead
2026-05-12163.88210.00-2.37CMI ahead
2026-05-11167.02209.43-2.21CMI ahead
2026-05-08162.69202.54-2.17CMI ahead
2026-05-07166.30203.53-2.05CMI ahead
2026-05-06170.51213.33-2.27CMI ahead
2026-05-05163.34201.15-2.15CMI ahead
2026-05-04171.68195.74-1.48CMI ahead
2026-05-01171.39195.95-1.51CMI ahead
2026-04-30171.45200.00-1.71CMI ahead
2026-04-29164.87190.44-1.63CMI ahead
2026-04-28171.29191.48-1.34CMI ahead
2026-04-27175.95196.95-1.36CMI ahead
2026-04-24176.81196.94-1.32CMI ahead
2026-04-23178.68195.80-1.18CMI ahead
2026-04-22173.60190.52-1.20CMI ahead
2026-04-21171.67190.45-1.30CMI ahead
2026-04-20180.84189.74-0.79CMI ahead
2026-04-17186.82186.93-0.35near the usual relationship
2026-04-16182.87181.48-0.27near the usual relationship
2026-04-15188.91179.27+0.15near the usual relationship
2026-04-14188.79183.47-0.07near the usual relationship
2026-04-13184.48184.28-0.32near the usual relationship
2026-04-10181.90183.64-0.41near the usual relationship
2026-04-09182.47182.11-0.30near the usual relationship
2026-04-08183.65177.83-0.02near the usual relationship
2026-04-07169.91165.95-0.09near the usual relationship
2026-04-06171.13164.52+0.06near the usual relationship
2026-04-02170.34163.83+0.06near the usual relationship
2026-04-01168.62163.96-0.03near the usual relationship
2026-03-31162.02160.36-0.18near the usual relationship
2026-03-30151.80152.51-0.30near the usual relationship
2026-03-27160.52155.95+0.00near the usual relationship
2026-03-26162.50157.97+0.00near the usual relationship
2026-03-25176.00164.93+0.33near the usual relationship
2026-03-24162.24165.35-0.39near the usual relationship
2026-03-23162.31163.41-0.27near the usual relationship
2026-03-20158.27159.02-0.25near the usual relationship
2026-03-19166.48161.02+0.08near the usual relationship
2026-03-18165.58161.93-0.01near the usual relationship
2026-03-17164.39161.92-0.06near the usual relationship
2026-03-16162.17162.45-0.19near the usual relationship
2026-03-13153.82159.67-0.47near the usual relationship
2026-03-12156.74160.58-0.35near the usual relationship
2026-03-11155.28165.76-0.67CMI ahead
2026-03-10155.23166.53-0.70CMI ahead
2026-03-09158.78163.99-0.39near the usual relationship
2026-03-06154.69160.72-0.43near the usual relationship
2026-03-05154.90165.74-0.64CMI ahead
2026-03-04162.88171.10-0.49near the usual relationship
2026-03-03163.09166.94-0.28near the usual relationship
2026-03-02171.52172.98-0.16near the usual relationship
2026-02-27163.20174.02-0.57CMI ahead
2026-02-26164.20175.29-0.56CMI ahead
2026-02-25165.02177.17-0.59CMI ahead
2026-02-24161.82178.98-0.80CMI ahead
2026-02-23157.18175.06-0.83CMI ahead
2026-02-20163.57176.83-0.61CMI ahead
2026-02-19165.65177.91-0.55CMI ahead
2026-02-18160.25176.75-0.73CMI ahead
2026-02-17159.33177.54-0.79CMI ahead
2026-02-13158.78179.13-0.87CMI ahead
2026-02-12156.01175.49-0.84CMI ahead
2026-02-11157.28178.50-0.90CMI ahead
2026-02-10158.33175.28-0.73CMI ahead
2026-02-09160.84179.24-0.77CMI ahead
2026-02-06156.24172.19-0.68CMI ahead
2026-02-05148.50161.14-0.57CMI ahead
2026-02-04150.62180.51-1.25CMI ahead
2026-02-03167.09179.63-0.51CMI ahead
2026-02-02163.25177.38-0.58CMI ahead
2026-01-30162.77172.52-0.40near the usual relationship
2026-01-29166.53174.05-0.31near the usual relationship
2026-01-28171.38172.23-0.04near the usual relationship
2026-01-27168.29171.75-0.14near the usual relationship
2026-01-26163.25169.88-0.27near the usual relationship
2026-01-23164.61170.42-0.23near the usual relationship
2026-01-22163.48173.79-0.41near the usual relationship
2026-01-21166.01173.48-0.29near the usual relationship
2026-01-20163.28168.64-0.21near the usual relationship
2026-01-16172.64172.56+0.01near the usual relationship
2026-01-15168.96171.33-0.08near the usual relationship
2026-01-14161.70168.45-0.26near the usual relationship
2026-01-13166.82169.13-0.07near the usual relationship
2026-01-12163.71167.56-0.13near the usual relationship
2026-01-09159.62164.55-0.17near the usual relationship
2026-01-08153.08162.29-0.36near the usual relationship
2026-01-07152.32160.66-0.32near the usual relationship
2026-01-06154.74162.96-0.31near the usual relationship
2026-01-05149.77158.48-0.33near the usual relationship
2026-01-02144.09155.59-0.46near the usual relationship
2025-12-31136.95152.14-0.65CMI ahead
2025-12-30138.15153.08-0.63CMI ahead
2025-12-29139.05153.39-0.60CMI ahead
2025-12-26139.36154.73-0.64CMI ahead
2025-12-24140.39154.27-0.57CMI ahead
2025-12-23140.73154.12-0.54CMI ahead
2025-12-22141.36154.77-0.54CMI ahead
2025-12-19139.79151.03-0.45near the usual relationship
2025-12-18135.29149.21-0.58CMI ahead
2025-12-17133.21148.26-0.64CMI ahead
2025-12-16137.23153.36-0.67CMI ahead
2025-12-15138.16154.17-0.66CMI ahead
2025-12-12138.68152.02-0.54CMI ahead
2025-12-11145.30156.00-0.40near the usual relationship
2025-12-10142.34156.34-0.55CMI ahead
2025-12-09140.37149.07-0.33near the usual relationship
2025-12-08141.63151.32-0.37near the usual relationship
2025-12-05140.93152.20-0.44near the usual relationship
2025-12-04141.30152.23-0.42near the usual relationship
2025-12-03138.43151.35-0.52CMI ahead
2025-12-02139.61149.47-0.38near the usual relationship
2025-12-01138.60147.88-0.36near the usual relationship
2025-11-28141.73148.42-0.24near the usual relationship
2025-11-26141.18148.17-0.25near the usual relationship
2025-11-25138.86147.52-0.33near the usual relationship
2025-11-24138.36144.74-0.23near the usual relationship
2025-11-21134.55140.83-0.23near the usual relationship
2025-11-20138.88138.65+0.07near the usual relationship
2025-11-19142.47141.06+0.13near the usual relationship
2025-11-18139.38138.57+0.10near the usual relationship
2025-11-17139.59135.91+0.24near the usual relationship
2025-11-14141.28137.88+0.23near the usual relationship
2025-11-13140.94139.34+0.15near the usual relationship
2025-11-12155.91142.91+0.64BWXT ahead
2025-11-11155.02141.88+0.65BWXT ahead
2025-11-10157.51144.36+0.65BWXT ahead
2025-11-07153.36141.08+0.63BWXT ahead
2025-11-06153.66137.94+0.79BWXT ahead
2025-11-05156.98130.90+1.28BWXT ahead
2025-11-04158.78127.79+1.52BWXT ahead
2025-11-03171.03130.46+1.89BWXT ahead
2025-10-31169.25130.45+1.84BWXT ahead
2025-10-30169.40130.57+1.86BWXT ahead
2025-10-29169.31131.52+1.83BWXT ahead
2025-10-28164.50123.48+2.08BWXT ahead
2025-10-27161.66125.50+1.88BWXT ahead
2025-10-24161.06125.61+1.86BWXT ahead
2025-10-23158.40124.51+1.83BWXT ahead
2025-10-22151.47121.60+1.70BWXT ahead
2025-10-21162.62124.58+2.05BWXT ahead
2025-10-20164.58123.40+2.23BWXT ahead
2025-10-17160.94122.75+2.13BWXT ahead
2025-10-16165.60125.98+2.18BWXT ahead
2025-10-15161.49126.19+2.01BWXT ahead
2025-10-14160.42124.18+2.11BWXT ahead
2025-10-13156.38121.90+2.08BWXT ahead
2025-10-10150.61123.12+1.75BWXT ahead
2025-10-09154.98127.18+1.74BWXT ahead
2025-10-08156.10130.06+1.65BWXT ahead
2025-10-07151.64129.41+1.48BWXT ahead
2025-10-06151.64130.81+1.41BWXT ahead
2025-10-03147.88129.00+1.34BWXT ahead
2025-10-02147.14128.94+1.31BWXT ahead
2025-10-01148.31126.57+1.53BWXT ahead
2025-09-30146.08125.89+1.47BWXT ahead
2025-09-29144.17125.01+1.43BWXT ahead
2025-09-26143.11124.60+1.41BWXT ahead
2025-09-25139.62123.41+1.31BWXT ahead
2025-09-24138.67124.58+1.19BWXT ahead
2025-09-23141.05126.42+1.22BWXT ahead
2025-09-22141.19126.63+1.23BWXT ahead
2025-09-19138.26126.27+1.10BWXT ahead
2025-09-18137.89127.09+1.03BWXT ahead
2025-09-17133.41122.73+1.05BWXT ahead
2025-09-16139.97123.82+1.37BWXT ahead
2025-09-15138.10123.45+1.30BWXT ahead
2025-09-12133.37122.28+1.11BWXT ahead
2025-09-11134.78122.51+1.19BWXT ahead
2025-09-10131.63120.79+1.12BWXT ahead
2025-09-09128.54117.67+1.15BWXT ahead
2025-09-08129.74118.45+1.18BWXT ahead
2025-09-05129.66119.18+1.14BWXT ahead
2025-09-04129.78119.50+1.13BWXT ahead
2025-09-03127.53116.88+1.18BWXT ahead
2025-09-02126.80117.80+1.08BWXT ahead
2025-08-29128.39118.76+1.12BWXT ahead
2025-08-28131.39119.79+1.25BWXT ahead
2025-08-27131.21119.64+1.26BWXT ahead
2025-08-26131.94118.76+1.37BWXT ahead
2025-08-25129.02118.06+1.25BWXT ahead
2025-08-22129.22119.91+1.15BWXT ahead
2025-08-21131.00117.49+1.43BWXT ahead
2025-08-20129.59118.13+1.31BWXT ahead
2025-08-19131.34119.88+1.31BWXT ahead
2025-08-18135.44119.80+1.59BWXT ahead
2025-08-15137.47119.05+1.78BWXT ahead
2025-08-14138.42120.65+1.74BWXT ahead
2025-08-13140.05121.25+1.82BWXT ahead
2025-08-12142.23118.94+2.14BWXT ahead
2025-08-11140.95115.74+2.32BWXT ahead
2025-08-08141.98115.36+2.45BWXT ahead
2025-08-07142.25114.63+2.56BWXT ahead
2025-08-06142.41113.76+2.69BWXT ahead
2025-08-05144.20111.24+3.06BWXT ahead
2025-08-04122.42107.77+1.90BWXT ahead
2025-08-01118.45106.06+1.77BWXT ahead
2025-07-31120.38109.57+1.64BWXT ahead
2025-07-30120.74108.94+1.73BWXT ahead
2025-07-29119.07109.19+1.60BWXT ahead
2025-07-28118.71110.49+1.47BWXT ahead
2025-07-25117.23110.14+1.39BWXT ahead
2025-07-24113.97108.87+1.25BWXT ahead
2025-07-23113.60107.89+1.31BWXT ahead
2025-07-22110.96106.48+1.22BWXT ahead
2025-07-21111.21102.72+1.59BWXT ahead
2025-07-18113.26104.44+1.62BWXT ahead
2025-07-17112.78103.77+1.66BWXT ahead
2025-07-16110.81103.00+1.57BWXT ahead
2025-07-15108.91101.92+1.52BWXT ahead
2025-07-14109.86101.40+1.67BWXT ahead
2025-07-11108.60100.99+1.61BWXT ahead
2025-07-10108.11101.35+1.55BWXT ahead
2025-07-09108.9999.73+1.80BWXT ahead
2025-07-08108.8498.58+1.92BWXT ahead
2025-07-07113.9397.72+2.49BWXT ahead
2025-07-03113.2398.90+2.35BWXT ahead
2025-07-02111.5499.38+2.17BWXT ahead
2025-07-01111.2298.24+2.29BWXT ahead
2025-06-30114.1497.61+2.68BWXT ahead
2025-06-27113.4597.08+2.72BWXT ahead
2025-06-26112.4196.63+2.72BWXT ahead
2025-06-25111.6195.00+2.88BWXT ahead
2025-06-24112.7696.52+2.88BWXT ahead
2025-06-23112.5694.29+3.20BWXT ahead
2025-06-20112.7693.67+3.38BWXT ahead
2025-06-18111.3593.88+3.29BWXT ahead
2025-06-17111.8193.83+3.44BWXT ahead
2025-06-16110.6696.07+3.10BWXT ahead
2025-06-13109.4095.24+3.13BWXT ahead
2025-06-12109.1796.79+2.97BWXT ahead
2025-06-11107.6096.44+2.89BWXT ahead
2025-06-10104.3697.46+2.39BWXT ahead
2025-06-09105.0897.07+2.58BWXT ahead
2025-06-06102.7897.34+2.28BWXT ahead
2025-06-05102.1696.31+2.38BWXT ahead
2025-06-04102.1196.22+2.42BWXT ahead
2025-06-03101.7096.71+2.33BWXT ahead
2025-06-0299.9194.55+2.44BWXT ahead
2025-05-3099.5295.82+2.22BWXT ahead
2025-05-2999.2496.83+2.06BWXT ahead
2025-05-28100.3096.28+2.33BWXT ahead
2025-05-2796.9597.24+1.71BWXT ahead
2025-05-2394.6894.55+1.80BWXT ahead
2025-05-2285.2795.91+0.08near the usual relationship
2025-05-2185.0996.33-0.01near the usual relationship
2025-05-2087.3298.82+0.00near the usual relationship
2025-05-1987.15100.34-0.24near the usual relationship
2025-05-1686.9199.69-0.18near the usual relationship
2025-05-1586.2398.99-0.19near the usual relationship
2025-05-1484.8999.20-0.44near the usual relationship
2025-05-1384.9399.72-0.50CMI ahead
2025-05-1284.8598.53-0.34near the usual relationship
2025-05-0985.8691.42+0.89BWXT ahead
2025-05-0885.5391.33+0.85BWXT ahead
2025-05-0785.3888.80+1.23BWXT ahead
2025-05-0685.6788.92+1.26BWXT ahead
2025-05-0588.7590.10+1.59BWXT ahead
2025-05-0289.2289.37+1.80BWXT ahead
2025-05-0188.0487.89+1.87BWXT ahead
2025-04-3086.4687.58+1.67BWXT ahead
2025-04-2986.5587.38+1.74BWXT ahead
2025-04-2885.9887.69+1.60BWXT ahead
2025-04-2586.3487.41+1.73BWXT ahead
2025-04-2485.5287.62+1.57BWXT ahead
2025-04-2382.9184.55+1.66BWXT ahead
2025-04-2281.0683.19+1.58BWXT ahead
2025-04-2179.6081.73+1.59BWXT ahead
2025-04-1782.1783.99+1.67BWXT ahead
2025-04-1682.2983.62+1.78BWXT ahead
2025-04-1582.4785.65+1.46BWXT ahead
2025-04-1482.3086.01+1.38BWXT ahead
2025-04-1181.8185.21+1.44BWXT ahead
2025-04-1080.0483.98+1.34BWXT ahead
2025-04-0982.4788.39+1.02BWXT ahead
2025-04-0873.8279.62+0.93BWXT ahead
2025-04-0771.3382.16-0.09near the usual relationship
2025-04-0470.7182.75-0.34near the usual relationship
2025-04-0375.6088.03-0.26near the usual relationship
2025-04-0280.7495.37-0.49near the usual relationship
2025-04-0179.6293.99-0.49near the usual relationship
2025-03-3178.1693.42-0.68CMI ahead
2025-03-2878.6193.59-0.63CMI ahead
2025-03-2780.3796.40-0.75CMI ahead
2025-03-2681.0997.77-0.83CMI ahead
2025-03-2582.9998.62-0.62CMI ahead
2025-03-2482.4798.68-0.73CMI ahead
2025-03-2178.7496.00-1.02CMI ahead
2025-03-2079.5496.99-1.03CMI ahead
2025-03-1981.2597.51-0.80CMI ahead
2025-03-1878.4196.14-1.13CMI ahead
2025-03-1779.2397.21-1.15CMI ahead
2025-03-1477.8695.88-1.21CMI ahead
2025-03-1376.9193.27-0.99CMI ahead
2025-03-1277.7098.57-1.67CMI ahead
2025-03-1176.7898.18-1.79CMI ahead
2025-03-1076.5399.62-2.07CMI ahead
2025-03-0778.88101.97-1.98CMI ahead
2025-03-0679.42102.79-2.01CMI ahead
2025-03-0582.35103.52-1.59CMI ahead
2025-03-0480.22103.52-1.99CMI ahead
2025-03-0380.42106.10-2.35CMI ahead
2025-02-2882.38109.74-2.53CMI ahead
2025-02-2780.92108.54-2.68CMI ahead
2025-02-2684.49109.30-2.16CMI ahead
2025-02-2582.46107.61-2.33CMI ahead
2025-02-2479.15107.44-3.01CMI ahead
2025-02-2180.33109.36-3.13CMI ahead
2025-02-2083.05114.57-3.43CMI ahead
2025-02-1985.33115.07-3.12CMI ahead
2025-02-1884.57113.00-3.03CMI ahead
2025-02-1484.64111.41-2.83CMI ahead
2025-02-1386.46110.08-2.28CMI ahead
2025-02-1286.67108.66-2.04CMI ahead
2025-02-1188.65111.04-2.05CMI ahead
2025-02-1090.38111.44-1.79CMI ahead
2025-02-0790.67110.83-1.64CMI ahead
2025-02-0689.37110.03-1.79CMI ahead
2025-02-0589.70110.25-1.78CMI ahead
2025-02-0488.23108.35-1.78CMI ahead
2025-02-0388.99103.79-0.84CMI ahead
2025-01-3189.48106.18-1.17CMI ahead
2025-01-3091.31107.20-0.98CMI ahead
2025-01-2988.85105.52-1.20CMI ahead
2025-01-2888.79104.40-1.02CMI ahead
2025-01-2788.31103.97-1.05CMI ahead
2025-01-24101.14109.57+0.49near the usual relationship
2025-01-23101.78109.95+0.54BWXT ahead
2025-01-22101.68109.09+0.67BWXT ahead
2025-01-21100.37109.44+0.38near the usual relationship
2025-01-1797.00109.19-0.22near the usual relationship
2025-01-1695.97109.19-0.42near the usual relationship
2025-01-1593.90107.54-0.54CMI ahead
2025-01-1492.79108.57-0.94CMI ahead
2025-01-1390.75107.62-1.20CMI ahead
2025-01-1090.87105.77-0.85CMI ahead
2025-01-0890.75107.22-1.13CMI ahead
2025-01-0791.22107.29-1.04CMI ahead
2025-01-0690.94106.72-1.00CMI ahead
2025-01-0389.93105.62-1.01CMI ahead
2025-01-0288.33103.62-0.99CMI ahead
2024-12-3188.26103.90-1.06CMI ahead
2024-12-3088.87103.84-0.92CMI ahead
2024-12-2789.15104.66-1.00CMI ahead
2024-12-2689.53105.56-1.08CMI ahead
2024-12-2489.43105.47-1.09CMI ahead
2024-12-2388.65104.66-1.11CMI ahead
2024-12-2089.76104.73-0.89CMI ahead
2024-12-1989.50104.23-0.85CMI ahead
2024-12-1890.10104.52-0.78CMI ahead
2024-12-1793.55107.67-0.63CMI ahead
2024-12-1696.55109.38-0.33near the usual relationship
2024-12-1395.80109.54-0.50CMI ahead
2024-12-1297.18110.45-0.39near the usual relationship
2024-12-1197.33110.32-0.34near the usual relationship
2024-12-1096.74112.58-0.83CMI ahead
2024-12-0996.82114.28-1.10CMI ahead
2024-12-0699.84113.14-0.35near the usual relationship
2024-12-05101.39112.83-0.02near the usual relationship
2024-12-04103.40112.76+0.35near the usual relationship
2024-12-03102.37111.99+0.29near the usual relationship
2024-12-02102.31112.46+0.20near the usual relationship
2024-11-29103.68111.78+0.56BWXT ahead
2024-11-27103.36110.59+0.70BWXT ahead
2024-11-26104.87112.48+0.66BWXT ahead
2024-11-25103.31111.85+0.49near the usual relationship
2024-11-22105.29111.06+0.97BWXT ahead
2024-11-21105.60109.94+1.22BWXT ahead
2024-11-20102.81107.58+1.13BWXT ahead
2024-11-19103.26107.85+1.17BWXT ahead
2024-11-1899.98108.50+0.46near the usual relationship
2024-11-15100.03107.85+0.58BWXT ahead
2024-11-14101.60108.41+0.77BWXT ahead
2024-11-13104.67109.19+1.20BWXT ahead
2024-11-12100.57105.83+1.04BWXT ahead
2024-11-11100.24106.83+0.80BWXT ahead
2024-11-0898.70106.24+0.62BWXT ahead
2024-11-0795.91105.73+0.17near the usual relationship
2024-11-0693.76106.11-0.32near the usual relationship
2024-11-0592.66105.65-0.46near the usual relationship
2024-11-0494.8397.05+1.56BWXT ahead
2024-11-0197.1297.91+1.86BWXT ahead
2024-10-3196.4798.05+1.72BWXT ahead
2024-10-3098.9298.91+2.06BWXT ahead
2024-10-2999.4698.70+2.23BWXT ahead
2024-10-2898.0699.75+1.77BWXT ahead
2024-10-2597.4898.11+2.00BWXT ahead
2024-10-2496.9699.10+1.71BWXT ahead
2024-10-2397.3998.35+1.97BWXT ahead
2024-10-2297.9698.57+2.06BWXT ahead
2024-10-21100.4399.44+2.41BWXT ahead
2024-10-18100.00100.00+2.24BWXT ahead

One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Jan 27, 2025 (BWXT -12.7%, CMI -5.1%); May 12, 2025 (BWXT -1.2%, CMI +7.8%); May 23, 2025 (BWXT +11.0%, CMI -1.4%); Aug 5, 2025 (BWXT +17.8%, CMI +3.2%); Feb 4, 2026 (BWXT -9.8%, CMI +0.5%); Feb 5, 2026 (BWXT -1.4%, CMI -10.7%). Upcoming earnings: BWXT Nov 2, 2026 (after-hours); CMI Nov 5, 2026 (pre-market).

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)

No simulated trade through Oct 20, 2026: the pair rarely passed every test while 2 standard deviations apart.

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

The companies

BWXT and CMI at a glance

BWXT BWX Technologies Inc.

Listing
NYSE · SEC CIK 1486957
Industry
Industrial Machinery/Components · SIC 3510 Engines & Turbines
Market value
$12.4B
Price history
2,521 daily closes, Oct 12, 2016 to Oct 22, 2026

CMI Cummins Inc.

Listing
NYSE · SEC CIK 26172
Industry
Industrial Machinery/Components · SIC 3510 Engines & Turbines
Market value
$71.9B
Price history
2,521 daily closes, Oct 12, 2016 to Oct 22, 2026

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

Follow the research behind the paper book

Boostio is a research-first platform in private beta: crypto candidates, daily market stories, public paper trading and now rival stocks. Exploring these pages stays free and open.

Explore the private beta

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.