Medical/Dental Instruments

Boston Scientific Corporation vs 3M Company

WatchlistBSX / MMMPrices through Oct 22, 2026

Why these are rivals: #2 and #3 by market value ($84B vs $65B) in Nasdaq's "Medical/Dental Instruments" industry; SEC SIC 3841 / 3841 (same major group); #2 and #3 by market value ($84B vs $65B) with SEC SIC 3841 (Surgical & Medical Instruments & Apparatus).

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: -0.06 (needs >= 0.60)
  • Mean reversion: ADF t-statistic of the spread: -0.83 (needs <= -2.873 (5% critical value))
  • Speed: half-life of the spread, sessions: 156.29 (needs <= 63)
Business leadership

MMM is the larger business

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

YearBSXMMMLarger
2025$20.1B$24.9BMMM
2024$16.7B$24.6BMMM
2023$14.2B$24.6BMMM
2022$12.7B$26.2BMMM
2021$11.9B$35.4BMMM
2020$9.9B$32.2BMMM

MMM led in every year with figures for both. Market value: BSX $65.3B, MMM $83.6B.

Stock leadership

MMM is ahead now

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

MMM leads BSX by 1.24 standard deviations: +49.5% over its usual price ratio. 0 lead switches in the last year.

Price change3 mo6 mo12 mo
BSX+4.0%-30.0%-53.9%
MMM+1.7%+21.2%+5.4%
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: -0.06 (needs >= 0.60)
Fail
Mean reversion: ADF t-statistic of the spread: -0.83 (needs <= -2.873 (5% critical value))
Fail
Speed: half-life of the spread, sessions: 156.29 (needs <= 63)
Data
Both stocks current
The twins over two years

Prices side by side, and the gap between them

BSX Boston Scientific Corporation MMM 3M CompanyPrice index, 100 = 2024-10-18. Tint = which stock is ahead of the pair's usual 1-year relationship (z beyond +/-0.5).
50100Oct 2024Oct 2025Oct 2026BSX 52MMM 130
Spread z-score: BSX relative to MMM, against the 252 sessions before each day. Above 0: BSX ahead; below 0: MMM ahead. Lines at +/-2 (idea) and +/-4 (stop).
-4stop-2idea0+2idea+4stopOct 2024Oct 2025Oct 2026
Data table (504 sessions)
DateBSX indexMMM indexzAhead
2026-10-2252.24129.91-1.24MMM ahead
2026-10-2150.54129.30-1.34MMM ahead
2026-10-2051.75126.81-1.22MMM ahead
2026-10-1951.15119.88-1.09MMM ahead
2026-10-1650.40121.91-1.19MMM ahead
2026-10-1550.12122.34-1.23MMM ahead
2026-10-1448.82121.70-1.30MMM ahead
2026-10-1349.18120.45-1.26MMM ahead
2026-10-1249.78119.05-1.20MMM ahead
2026-10-0948.52118.37-1.27MMM ahead
2026-10-0847.73121.04-1.40MMM ahead
2026-10-0747.21119.96-1.41MMM ahead
2026-10-0647.91121.09-1.41MMM ahead
2026-10-0548.14120.76-1.40MMM ahead
2026-10-0248.37119.79-1.37MMM ahead
2026-10-0149.09120.63-1.36MMM ahead
2026-09-3049.56121.47-1.36MMM ahead
2026-09-2949.82124.68-1.44MMM ahead
2026-09-2850.09125.41-1.45MMM ahead
2026-09-2549.87125.46-1.48MMM ahead
2026-09-2450.73123.96-1.40MMM ahead
2026-09-2350.66126.02-1.47MMM ahead
2026-09-2251.00125.28-1.44MMM ahead
2026-09-2149.64122.07-1.45MMM ahead
2026-09-1849.21122.75-1.51MMM ahead
2026-09-1749.45121.88-1.49MMM ahead
2026-09-1649.86120.36-1.43MMM ahead
2026-09-1549.81121.85-1.49MMM ahead
2026-09-1451.15119.89-1.37MMM ahead
2026-09-1148.80122.07-1.58MMM ahead
2026-09-1048.94120.51-1.55MMM ahead
2026-09-0951.05121.65-1.45MMM ahead
2026-09-0851.07123.96-1.52MMM ahead
2026-09-0454.28124.73-1.37MMM ahead
2026-09-0353.31124.54-1.43MMM ahead
2026-09-0254.92124.87-1.35MMM ahead
2026-09-0154.59125.97-1.41MMM ahead
2026-08-3154.84127.15-1.44MMM ahead
2026-08-2853.18129.01-1.59MMM ahead
2026-08-2752.99132.33-1.70MMM ahead
2026-08-2654.70133.20-1.64MMM ahead
2026-08-2556.61132.73-1.53MMM ahead
2026-08-2455.65132.46-1.59MMM ahead
2026-08-2157.19132.43-1.52MMM ahead
2026-08-2056.06131.78-1.58MMM ahead
2026-08-1959.06133.68-1.47MMM ahead
2026-08-1857.31133.89-1.59MMM ahead
2026-08-1758.40133.35-1.53MMM ahead
2026-08-1458.85135.16-1.56MMM ahead
2026-08-1358.69135.16-1.58MMM ahead
2026-08-1258.39135.99-1.64MMM ahead
2026-08-1158.12135.51-1.65MMM ahead
2026-08-1057.30134.70-1.70MMM ahead
2026-08-0755.99135.34-1.80MMM ahead
2026-08-0655.98133.72-1.78MMM ahead
2026-08-0554.21134.73-1.93MMM ahead
2026-08-0455.74134.27-1.85MMM ahead
2026-08-0354.99131.15-1.84MMM ahead
2026-07-3153.06130.44-1.96MMM ahead
2026-07-3052.23130.29-2.03MMM ahead
2026-07-2952.28131.68-2.08MMM ahead
2026-07-2852.30135.03-2.19MMM ahead
2026-07-2751.67131.89-2.18MMM ahead
2026-07-2450.24127.73-2.19MMM ahead
2026-07-2349.48125.49-2.22MMM ahead
2026-07-2248.79126.36-2.32MMM ahead
2026-07-2149.04126.36-2.33MMM ahead
2026-07-2049.70117.74-2.07MMM ahead
2026-07-1749.99118.28-2.09MMM ahead
2026-07-1650.66119.71-2.11MMM ahead
2026-07-1548.87118.79-2.24MMM ahead
2026-07-1448.40115.87-2.22MMM ahead
2026-07-1350.70116.69-2.10MMM ahead
2026-07-1050.83116.56-2.12MMM ahead
2026-07-0951.08114.95-2.07MMM ahead
2026-07-0850.88114.47-2.10MMM ahead
2026-07-0751.44116.92-2.17MMM ahead
2026-07-0650.64117.77-2.28MMM ahead
2026-07-0251.25118.72-2.30MMM ahead
2026-07-0148.89118.37-2.50MMM ahead
2026-06-3048.46119.81-2.63MMM ahead
2026-06-2949.37120.19-2.61MMM ahead
2026-06-2650.22121.36-2.63MMM ahead
2026-06-2550.19124.29-2.77MMM ahead
2026-06-2450.48122.77-2.75MMM ahead
2026-06-2351.78119.76-2.59MMM ahead
2026-06-2250.33120.78-2.79MMM ahead
2026-06-1851.43118.84-2.68MMM ahead
2026-06-1751.04117.83-2.72MMM ahead
2026-06-1653.28119.60-2.65MMM ahead
2026-06-1553.09117.09-2.61MMM ahead
2026-06-1253.26117.15-2.65MMM ahead
2026-06-1153.56116.85-2.66MMM ahead
2026-06-1054.89116.06-2.56MMM ahead
2026-06-0955.59115.72-2.53MMM ahead
2026-06-0855.30113.84-2.52MMM ahead
2026-06-0555.13113.78-2.57MMM ahead
2026-06-0455.47113.05-2.56MMM ahead
2026-06-0354.15112.22-2.68MMM ahead
2026-06-0254.14113.14-2.77MMM ahead
2026-06-0154.48111.68-2.72MMM ahead
2026-05-2954.85113.31-2.81MMM ahead
2026-05-2855.76113.10-2.77MMM ahead
2026-05-2757.30114.82-2.76MMM ahead
2026-05-2665.45113.98-2.08MMM ahead
2026-05-2265.61112.80-2.04MMM ahead
2026-05-2164.89112.18-2.10MMM ahead
2026-05-2064.35110.83-2.10MMM ahead
2026-05-1964.51110.52-2.10MMM ahead
2026-05-1863.49112.87-2.33MMM ahead
2026-05-1559.82108.20-2.45MMM ahead
2026-05-1460.80107.38-2.36MMM ahead
2026-05-1360.25108.85-2.52MMM ahead
2026-05-1261.43105.97-2.31MMM ahead
2026-05-1160.60106.07-2.42MMM ahead
2026-05-0861.24106.03-2.39MMM ahead
2026-05-0764.23106.37-2.17MMM ahead
2026-05-0663.59108.44-2.37MMM ahead
2026-05-0563.56105.68-2.26MMM ahead
2026-05-0464.55104.75-2.14MMM ahead
2026-05-0164.15105.45-2.24MMM ahead
2026-04-3065.41108.42-2.32MMM ahead
2026-04-2964.89106.46-2.29MMM ahead
2026-04-2866.37108.06-2.28MMM ahead
2026-04-2768.07107.87-2.15MMM ahead
2026-04-2470.48108.03-1.98MMM ahead
2026-04-2374.59107.18-1.61MMM ahead
2026-04-2273.66107.87-1.74MMM ahead
2026-04-2167.58109.86-2.39MMM ahead
2026-04-2069.25112.03-2.40MMM ahead
2026-04-1772.93114.36-2.24MMM ahead
2026-04-1672.01111.40-2.19MMM ahead
2026-04-1573.36111.91-2.13MMM ahead
2026-04-1472.47112.88-2.29MMM ahead
2026-04-1371.74113.06-2.40MMM ahead
2026-04-1070.16111.23-2.48MMM ahead
2026-04-0969.58111.37-2.58MMM ahead
2026-04-0871.03110.38-2.43MMM ahead
2026-04-0770.24106.82-2.32MMM ahead
2026-04-0671.07106.93-2.29MMM ahead
2026-04-0271.33106.90-2.29MMM ahead
2026-04-0170.40107.48-2.45MMM ahead
2026-03-3171.25107.47-2.41MMM ahead
2026-03-3071.45105.46-2.30MMM ahead
2026-03-2778.54105.85-1.69MMM ahead
2026-03-2679.68106.55-1.65MMM ahead
2026-03-2579.23109.55-1.91MMM ahead
2026-03-2477.38108.53-2.03MMM ahead
2026-03-2378.96108.45-1.91MMM ahead
2026-03-2078.89104.48-1.67MMM ahead
2026-03-1979.36105.60-1.72MMM ahead
2026-03-1880.94107.36-1.71MMM ahead
2026-03-1780.84110.30-1.94MMM ahead
2026-03-1679.24110.96-2.15MMM ahead
2026-03-1378.49111.71-2.31MMM ahead
2026-03-1277.84110.33-2.31MMM ahead
2026-03-1179.06114.82-2.53MMM ahead
2026-03-1079.44114.88-2.54MMM ahead
2026-03-0981.64112.20-2.19MMM ahead
2026-03-0681.02113.52-2.37MMM ahead
2026-03-0582.88115.59-2.37MMM ahead
2026-03-0481.99119.05-2.73MMM ahead
2026-03-0383.85117.27-2.48MMM ahead
2026-03-0286.54119.48-2.41MMM ahead
2026-02-2787.26122.33-2.58MMM ahead
2026-02-2686.01122.96-2.79MMM ahead
2026-02-2583.43122.50-3.08MMM ahead
2026-02-2485.33123.18-3.00MMM ahead
2026-02-2384.44123.09-3.15MMM ahead
2026-02-2084.68123.62-3.25MMM ahead
2026-02-1985.98122.13-3.07MMM ahead
2026-02-1886.61121.48-3.01MMM ahead
2026-02-1786.62124.03-3.28MMM ahead
2026-02-1384.85127.14-3.83MMM ahead
2026-02-1284.16129.21-4.22MMM ahead
2026-02-1183.42127.90-4.38MMM ahead
2026-02-1084.31128.33-4.49MMM ahead
2026-02-0984.16126.00-4.50MMM ahead
2026-02-0686.60127.76-4.52MMM ahead
2026-02-0588.16122.15-3.93MMM ahead
2026-02-0485.73121.20-4.34MMM ahead
2026-02-03104.03115.20-1.32MMM ahead
2026-02-02104.31113.53-1.12MMM ahead
2026-01-30106.20113.33-0.88MMM ahead
2026-01-29104.84115.72-1.31MMM ahead
2026-01-28106.49115.39-1.09MMM ahead
2026-01-27106.29116.95-1.29MMM ahead
2026-01-26106.22118.04-1.43MMM ahead
2026-01-23105.04120.38-1.83MMM ahead
2026-01-22103.66118.86-1.86MMM ahead
2026-01-21104.13115.35-1.43MMM ahead
2026-01-20103.55115.52-1.54MMM ahead
2026-01-16100.00124.17-2.98MMM ahead
2026-01-15102.23126.61-3.01MMM ahead
2026-01-14106.44125.79-2.42MMM ahead
2026-01-13106.89125.37-2.35MMM ahead
2026-01-12108.69124.27-2.03MMM ahead
2026-01-09110.87122.27-1.56MMM ahead
2026-01-08111.71122.27-1.47MMM ahead
2026-01-07112.01120.55-1.25MMM ahead
2026-01-06111.04122.99-1.66MMM ahead
2026-01-05108.41121.02-1.78MMM ahead
2026-01-02107.54119.74-1.77MMM ahead
2025-12-31108.27118.47-1.54MMM ahead
2025-12-30109.02119.26-1.55MMM ahead
2025-12-29108.73119.67-1.65MMM ahead
2025-12-26109.07119.93-1.66MMM ahead
2025-12-24109.15118.65-1.51MMM ahead
2025-12-23109.11118.51-1.51MMM ahead
2025-12-22109.49118.40-1.46MMM ahead
2025-12-19108.56119.85-1.78MMM ahead
2025-12-18109.13119.70-1.70MMM ahead
2025-12-17107.28120.00-2.01MMM ahead
2025-12-16105.54120.76-2.38MMM ahead
2025-12-15104.68122.61-2.77MMM ahead
2025-12-12105.12124.98-3.06MMM ahead
2025-12-11104.18124.76-3.25MMM ahead
2025-12-10105.26122.58-2.88MMM ahead
2025-12-09105.06122.16-2.91MMM ahead
2025-12-08106.55121.33-2.62MMM ahead
2025-12-05110.73123.93-2.38MMM ahead
2025-12-04110.96125.26-2.56MMM ahead
2025-12-03111.92128.08-2.85MMM ahead
2025-12-02112.43126.95-2.67MMM ahead
2025-12-01114.69126.15-2.25MMM ahead
2025-11-28115.34127.31-2.35MMM ahead
2025-11-26114.64126.39-2.36MMM ahead
2025-11-25115.09126.94-2.40MMM ahead
2025-11-24111.32125.47-2.84MMM ahead
2025-11-21110.00124.38-2.96MMM ahead
2025-11-20109.69121.81-2.68MMM ahead
2025-11-19110.15123.26-2.88MMM ahead
2025-11-18112.66122.68-2.40MMM ahead
2025-11-17115.54122.38-1.89MMM ahead
2025-11-14116.60124.00-1.99MMM ahead
2025-11-13119.20126.25-1.93MMM ahead
2025-11-12118.24126.59-2.16MMM ahead
2025-11-11116.38124.81-2.22MMM ahead
2025-11-10114.58124.07-2.44MMM ahead
2025-11-07113.57121.98-2.31MMM ahead
2025-11-06112.47121.24-2.42MMM ahead
2025-11-05112.30121.59-2.55MMM ahead
2025-11-04112.23118.83-2.11MMM ahead
2025-11-03111.95120.02-2.40MMM ahead
2025-10-31114.36123.21-2.53MMM ahead
2025-10-30114.19123.17-2.60MMM ahead
2025-10-29113.89121.82-2.45MMM ahead
2025-10-28114.65123.45-2.64MMM ahead
2025-10-27116.31124.61-2.58MMM ahead
2025-10-24114.81124.69-2.94MMM ahead
2025-10-23116.26126.98-3.13MMM ahead
2025-10-22117.92123.75-2.22MMM ahead
2025-10-21113.43123.31-3.09MMM ahead
2025-10-20114.15114.53-1.19MMM ahead
2025-10-17112.68112.95-1.16MMM ahead
2025-10-16111.03112.04-1.32MMM ahead
2025-10-15110.95113.56-1.66MMM ahead
2025-10-14109.28112.87-1.88MMM ahead
2025-10-13107.81111.81-1.99MMM ahead
2025-10-10108.33110.07-1.50MMM ahead
2025-10-09110.46113.13-1.68MMM ahead
2025-10-08109.90115.44-2.28MMM ahead
2025-10-07108.89114.94-2.41MMM ahead
2025-10-06109.80115.38-2.30MMM ahead
2025-10-03110.50117.40-2.57MMM ahead
2025-10-02109.25117.51-2.87MMM ahead
2025-10-01108.83115.44-2.52MMM ahead
2025-09-30110.86114.83-1.93MMM ahead
2025-09-29110.19114.02-1.89MMM ahead
2025-09-26111.48113.08-1.40MMM ahead
2025-09-25111.43113.24-1.44MMM ahead
2025-09-24111.34114.40-1.68MMM ahead
2025-09-23110.92115.65-2.02MMM ahead
2025-09-22110.17113.85-1.81MMM ahead
2025-09-19111.08115.88-2.02MMM ahead
2025-09-18111.54114.99-1.74MMM ahead
2025-09-17111.84114.81-1.64MMM ahead
2025-09-16112.39115.81-1.72MMM ahead
2025-09-15113.40115.92-1.54MMM ahead
2025-09-12116.62116.82-1.08MMM ahead
2025-09-11118.47118.00-0.95MMM ahead
2025-09-10119.48113.64+0.10near the usual relationship
2025-09-09122.73113.28+0.78BSX ahead
2025-09-08122.79113.96+0.67BSX ahead
2025-09-05121.74114.92+0.30near the usual relationship
2025-09-04121.82115.08+0.29near the usual relationship
2025-09-03122.10112.48+0.84BSX ahead
2025-09-02121.11114.16+0.35near the usual relationship
2025-08-29119.79115.09-0.04near the usual relationship
2025-08-28120.07116.59-0.25near the usual relationship
2025-08-27120.21115.83-0.08near the usual relationship
2025-08-26120.80115.86+0.02near the usual relationship
2025-08-25119.35115.32-0.12near the usual relationship
2025-08-22120.55117.45-0.28near the usual relationship
2025-08-21119.46114.24+0.10near the usual relationship
2025-08-20120.42114.51+0.22near the usual relationship
2025-08-19117.80114.21-0.15near the usual relationship
2025-08-18117.01113.11-0.09near the usual relationship
2025-08-15117.15112.76+0.00near the usual relationship
2025-08-14118.26115.92-0.34near the usual relationship
2025-08-13116.38118.54-1.06MMM ahead
2025-08-12116.54116.80-0.74MMM ahead
2025-08-11116.67114.93-0.41near the usual relationship
2025-08-08117.11113.44-0.08near the usual relationship
2025-08-07116.91112.28+0.08near the usual relationship
2025-08-06116.90111.60+0.20near the usual relationship
2025-08-05119.03111.06+0.62BSX ahead
2025-08-04121.26109.42+1.21BSX ahead
2025-08-01119.69106.86+1.41BSX ahead
2025-07-31119.13110.42+0.76BSX ahead
2025-07-30121.22108.49+1.37BSX ahead
2025-07-29120.89112.32+0.72BSX ahead
2025-07-28120.18112.51+0.58BSX ahead
2025-07-25120.52111.94+0.71BSX ahead
2025-07-24120.60110.48+0.94BSX ahead
2025-07-23122.36111.60+1.00BSX ahead
2025-07-22117.13111.88+0.22near the usual relationship
2025-07-21117.84113.08+0.14near the usual relationship
2025-07-18117.68113.39+0.06near the usual relationship
2025-07-17118.83117.69-0.40near the usual relationship
2025-07-16117.17116.59-0.48near the usual relationship
2025-07-15117.50115.87-0.34near the usual relationship
2025-07-14118.46116.85-0.35near the usual relationship
2025-07-11117.18115.32-0.32near the usual relationship
2025-07-10117.93116.41-0.38near the usual relationship
2025-07-09116.91115.42-0.39near the usual relationship
2025-07-08116.28113.76-0.25near the usual relationship
2025-07-07117.89112.36+0.16near the usual relationship
2025-07-03118.45113.17+0.11near the usual relationship
2025-07-02117.67113.93-0.10near the usual relationship
2025-07-01118.97113.82+0.08near the usual relationship
2025-06-30121.96112.65+0.61BSX ahead
2025-06-27120.96112.49+0.50BSX ahead
2025-06-26118.75111.56+0.34near the usual relationship
2025-06-25118.42109.33+0.60BSX ahead
2025-06-24118.22110.90+0.35near the usual relationship
2025-06-23116.23109.22+0.31near the usual relationship
2025-06-20115.02106.58+0.52BSX ahead
2025-06-18115.10105.45+0.68BSX ahead
2025-06-17115.51105.23+0.76BSX ahead
2025-06-16115.24107.35+0.42near the usual relationship
2025-06-13113.25105.31+0.44near the usual relationship
2025-06-12111.91107.13+0.01near the usual relationship
2025-06-11112.86108.91-0.11near the usual relationship
2025-06-10112.80107.34+0.08near the usual relationship
2025-06-09113.59106.73+0.25near the usual relationship
2025-06-06115.92107.67+0.41near the usual relationship
2025-06-05116.76108.23+0.43near the usual relationship
2025-06-04116.31108.64+0.32near the usual relationship
2025-06-03117.07109.61+0.28near the usual relationship
2025-06-02118.28108.33+0.58BSX ahead
2025-05-30119.52109.78+0.54BSX ahead
2025-05-29118.66110.72+0.31near the usual relationship
2025-05-28118.67110.00+0.40near the usual relationship
2025-05-27120.55110.62+0.53BSX ahead
2025-05-23118.66109.23+0.49near the usual relationship
2025-05-22118.66110.83+0.29near the usual relationship
2025-05-21118.81110.55+0.34near the usual relationship
2025-05-20120.97114.07+0.15near the usual relationship
2025-05-19121.11114.06+0.17near the usual relationship
2025-05-16120.40113.30+0.17near the usual relationship
2025-05-15119.06110.06+0.42near the usual relationship
2025-05-14116.90109.43+0.24near the usual relationship
2025-05-13116.90111.54-0.03near the usual relationship
2025-05-12116.80111.24-0.01near the usual relationship
2025-05-09116.79105.52+0.70BSX ahead
2025-05-08117.28104.43+0.89BSX ahead
2025-05-07119.00102.59+1.33BSX ahead
2025-05-06118.22102.13+1.30BSX ahead
2025-05-05118.36104.19+1.05BSX ahead
2025-05-02119.14105.14+1.02BSX ahead
2025-05-01117.17102.04+1.19BSX ahead
2025-04-30116.80102.79+1.04BSX ahead
2025-04-29116.66102.40+1.06BSX ahead
2025-04-28116.02102.06+1.02BSX ahead
2025-04-25115.70101.61+1.04BSX ahead
2025-04-24114.84102.77+0.80BSX ahead
2025-04-23112.32100.68+0.77BSX ahead
2025-04-22107.93100.88+0.22near the usual relationship
2025-04-21106.2693.30+1.04BSX ahead
2025-04-17108.0096.35+0.83BSX ahead
2025-04-16108.1596.54+0.82BSX ahead
2025-04-15106.99100.09+0.20near the usual relationship
2025-04-14107.04100.64+0.13near the usual relationship
2025-04-11106.36100.60+0.05near the usual relationship
2025-04-10105.1998.39+0.19near the usual relationship
2025-04-09109.88102.35+0.24near the usual relationship
2025-04-08102.9294.10+0.48near the usual relationship
2025-04-07103.9495.12+0.46near the usual relationship
2025-04-04101.8593.91+0.36near the usual relationship
2025-04-03111.84103.40+0.33near the usual relationship
2025-04-02113.60109.34-0.19near the usual relationship
2025-04-01114.95109.27-0.04near the usual relationship
2025-03-31114.55108.67-0.02near the usual relationship
2025-03-28112.82107.18-0.04near the usual relationship
2025-03-27114.45109.84-0.18near the usual relationship
2025-03-26116.20112.98-0.35near the usual relationship
2025-03-25117.04113.59-0.33near the usual relationship
2025-03-24116.58113.33-0.35near the usual relationship
2025-03-21114.33111.26-0.37near the usual relationship
2025-03-20115.26111.94-0.35near the usual relationship
2025-03-19114.37113.37-0.61MMM ahead
2025-03-18112.66111.68-0.62MMM ahead
2025-03-17112.30113.37-0.86MMM ahead
2025-03-14110.32111.30-0.85MMM ahead
2025-03-13108.29108.11-0.73MMM ahead
2025-03-12109.48111.17-0.94MMM ahead
2025-03-11108.46109.18-0.84MMM ahead
2025-03-10106.88109.23-1.03MMM ahead
2025-03-07112.56108.26-0.30near the usual relationship
2025-03-06114.45108.73-0.16near the usual relationship
2025-03-05118.89109.23+0.22near the usual relationship
2025-03-04117.65107.93+0.23near the usual relationship
2025-03-03119.08113.53-0.23near the usual relationship
2025-02-28117.85114.78-0.48near the usual relationship
2025-02-27114.45111.38-0.47near the usual relationship
2025-02-26115.32109.09-0.16near the usual relationship
2025-02-25114.36108.44-0.19near the usual relationship
2025-02-24118.53107.65+0.27near the usual relationship
2025-02-21118.64107.28+0.31near the usual relationship
2025-02-20119.63110.32+0.09near the usual relationship
2025-02-19119.98111.14+0.03near the usual relationship
2025-02-18119.62110.25+0.08near the usual relationship
2025-02-14120.48109.97+0.18near the usual relationship
2025-02-13120.52110.05+0.17near the usual relationship
2025-02-12120.10110.16+0.11near the usual relationship
2025-02-11120.34111.05+0.04near the usual relationship
2025-02-10120.56110.77+0.08near the usual relationship
2025-02-07119.51110.90-0.03near the usual relationship
2025-02-06119.25112.71-0.22near the usual relationship
2025-02-05119.19112.81-0.24near the usual relationship
2025-02-04117.57112.24-0.34near the usual relationship
2025-02-03117.03111.03-0.28near the usual relationship
2025-01-31116.23112.62-0.50MMM ahead
2025-01-30117.00114.25-0.58MMM ahead
2025-01-29116.62112.14-0.43near the usual relationship
2025-01-28116.18112.03-0.46near the usual relationship
2025-01-27116.12112.12-0.48near the usual relationship
2025-01-24115.75110.57-0.37near the usual relationship
2025-01-23115.41110.72-0.41near the usual relationship
2025-01-22113.90110.34-0.51MMM ahead
2025-01-21114.58108.69-0.29near the usual relationship
2025-01-17112.02104.36-0.11near the usual relationship
2025-01-16111.47102.99-0.02near the usual relationship
2025-01-15110.01101.95-0.05near the usual relationship
2025-01-14108.61101.53-0.13near the usual relationship
2025-01-13107.4399.60-0.04near the usual relationship
2025-01-10107.7397.09+0.25near the usual relationship
2025-01-08108.9599.55+0.12near the usual relationship
2025-01-07104.4598.25-0.17near the usual relationship
2025-01-06103.6696.41-0.06near the usual relationship
2025-01-03102.9796.10-0.08near the usual relationship
2025-01-02101.4995.97-0.21near the usual relationship
2024-12-31101.4295.52-0.17near the usual relationship
2024-12-30101.8395.55-0.12near the usual relationship
2024-12-27102.9496.33-0.09near the usual relationship
2024-12-26103.8497.07-0.07near the usual relationship
2024-12-24103.4196.46-0.05near the usual relationship
2024-12-23102.0395.44-0.07near the usual relationship
2024-12-20101.0095.66-0.19near the usual relationship
2024-12-19100.6794.07-0.05near the usual relationship
2024-12-1899.9592.89+0.01near the usual relationship
2024-12-17102.6894.75+0.08near the usual relationship
2024-12-16102.7195.80-0.01near the usual relationship
2024-12-13102.3296.14-0.08near the usual relationship
2024-12-12102.6796.01-0.03near the usual relationship
2024-12-11102.8396.03-0.01near the usual relationship
2024-12-10102.4296.03-0.05near the usual relationship
2024-12-09100.7497.30-0.33near the usual relationship
2024-12-06102.2798.50-0.30near the usual relationship
2024-12-05102.7998.66-0.26near the usual relationship
2024-12-04103.1596.53-0.02near the usual relationship
2024-12-03102.7397.05-0.10near the usual relationship
2024-12-02102.6898.34-0.23near the usual relationship
2024-11-29102.9498.81-0.25near the usual relationship
2024-11-27103.0498.03-0.16near the usual relationship
2024-11-26102.4398.38-0.25near the usual relationship
2024-11-25101.3496.43-0.17near the usual relationship
2024-11-22102.1995.03+0.05near the usual relationship
2024-11-21103.8994.21+0.29near the usual relationship
2024-11-20102.3894.60+0.12near the usual relationship
2024-11-19102.5794.86+0.11near the usual relationship
2024-11-18102.7096.32-0.02near the usual relationship
2024-11-1598.7796.04-0.36near the usual relationship
2024-11-1499.4597.91-0.47near the usual relationship
2024-11-13100.7997.27-0.29near the usual relationship
2024-11-12100.7496.46-0.21near the usual relationship
2024-11-11100.4798.42-0.42near the usual relationship
2024-11-08100.2099.41-0.54MMM ahead
2024-11-0798.6598.47-0.60MMM ahead
2024-11-0698.1599.10-0.71MMM ahead
2024-11-0597.1393.62-0.27near the usual relationship
2024-11-0496.2093.13-0.31near the usual relationship
2024-11-0194.9594.14-0.54MMM ahead
2024-10-3195.4095.06-0.58MMM ahead
2024-10-3095.3794.39-0.52MMM ahead
2024-10-2996.0195.66-0.58MMM ahead
2024-10-2896.2496.41-0.63MMM ahead
2024-10-2596.2192.31-0.23near the usual relationship
2024-10-2496.6393.58-0.31near the usual relationship
2024-10-2399.3094.65-0.17near the usual relationship
2024-10-2299.9397.48-0.38near the usual relationship
2024-10-2199.9899.78-0.60MMM ahead
2024-10-18100.00100.00-0.62MMM ahead

One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Oct 21, 2025 (BSX -0.6%, MMM +7.7%); Jan 20, 2026 (BSX +3.5%, MMM -7.0%); Feb 4, 2026 (BSX -17.6%, MMM +5.2%); May 27, 2026 (BSX -12.5%, MMM +0.7%). Upcoming earnings: BSX Oct 28, 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)

2 simulated trades to Oct 20, 2026: +1.89% per trade on average after costs, 1 won.

LegsEnteredExitedWhyDaysBefore costsCosts + borrowAfter costs
Long BSX · Short MMMOct 23, 2020Nov 24, 2020divergence stop32-$1,070.84-$47.34-$1,150.53 (-11.51%)
Long BSX · Short MMMJun 26, 2020Jul 30, 2020converged34$1,614.11-$50.32$1,529.18 (+15.29%)

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

The companies

BSX and MMM at a glance

BSX Boston Scientific Corporation

Listing
NYSE · SEC CIK 885725
Industry
Medical/Dental Instruments · SIC 3841 Surgical & Medical Instruments & Apparatus
Market value
$65.3B
Price history
2,521 daily closes, Oct 12, 2016 to Oct 22, 2026

MMM 3M Company

Listing
NYSE · SEC CIK 66740
Industry
Medical/Dental Instruments · SIC 3841 Surgical & Medical Instruments & Apparatus
Market value
$83.6B
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.

Related
All pairs →
PairStatusAhead nowIndustry
SYK / MMMWatchlistMMM by 1.56 sdMedical/Dental Instruments
SYK / BSXWatchlistSYK by 0.98 sdMedical/Dental Instruments

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.