Railroads

CSX Corporation vs Union Pacific Corporation

WatchlistCSX / UNPPrices through Oct 22, 2026

Why these are rivals: #1 and #2 by market value ($171B vs $89B) in Nasdaq's "Railroads" industry; SEC SIC 4011 / 4011 (same major group); #1 and #2 by market value ($171B vs $89B) with SEC SIC 4011 (Railroads, Line-Haul Operating).

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

  • Mean reversion: ADF t-statistic of the spread: -1.68 (needs <= -2.873 (5% critical value))
Business leadership

UNP is the larger business

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

YearCSXUNPLarger
2025$14.1B$24.5BUNP
2024$14.5B$24.3BUNP
2023$14.7B$24.1BUNP
2022$14.9B$24.9BUNP
2021$12.5B$21.8BUNP
2020$10.6B$19.5BUNP

UNP led in every year with figures for both. Market value: CSX $88.7B, UNP $170.5B.

Stock leadership

CSX is ahead now

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

CSX leads UNP by 1.09 standard deviations: +4.8% over its usual price ratio. 0 lead switches in the last year.

Price change3 mo6 mo12 mo
CSX-2.9%+11.9%+44.6%
UNP-3.0%+9.9%+31.6%
Relationship

Not a measured twin today

Only these tests can make a pair tradable on paper.

Pass
Aligned sessions: 2521 (needs >= 254)
Pass
Co-movement: daily return correlation, 252 sessions: 0.78 (needs >= 0.60)
Fail
Mean reversion: ADF t-statistic of the spread: -1.68 (needs <= -2.873 (5% critical value))
Pass
Speed: half-life of the spread, sessions: 26.87 (needs <= 63)
Data
Both stocks current
The twins over two years

Prices side by side, and the gap between them

CSX CSX Corporation UNP Union Pacific CorporationPrice index, 100 = 2024-10-18. Tint = which stock is ahead of the pair's usual 1-year relationship (z beyond +/-0.5).
100150Oct 2024Oct 2025Oct 2026CSX 151UNP 122
Spread z-score: CSX relative to UNP, against the 252 sessions before each day. Above 0: CSX ahead; below 0: UNP ahead. Lines at +/-2 (idea) and +/-4 (stop).
-4stop-2idea0+2idea+4stopOct 2024Oct 2025Oct 2026
Data table (504 sessions)
DateCSX indexUNP indexzAhead
2026-10-22151.44122.12+1.09CSX ahead
2026-10-21141.85117.93+0.38near the usual relationship
2026-10-20140.91117.82+0.25near the usual relationship
2026-10-19140.33117.58+0.20near the usual relationship
2026-10-16142.67118.41+0.43near the usual relationship
2026-10-15142.70118.28+0.47near the usual relationship
2026-10-14141.50117.34+0.46near the usual relationship
2026-10-13139.98115.67+0.55CSX ahead
2026-10-12139.95115.35+0.61CSX ahead
2026-10-09138.51114.03+0.65CSX ahead
2026-10-08138.75113.97+0.70CSX ahead
2026-10-07137.19112.53+0.74CSX ahead
2026-10-06139.21113.32+0.92CSX ahead
2026-10-05139.01113.50+0.86CSX ahead
2026-10-02139.01114.00+0.76CSX ahead
2026-10-01136.40111.60+0.82CSX ahead
2026-09-30136.31111.48+0.84CSX ahead
2026-09-29137.54112.31+0.88CSX ahead
2026-09-28137.05112.29+0.80CSX ahead
2026-09-25137.10112.16+0.84CSX ahead
2026-09-24137.60112.28+0.90CSX ahead
2026-09-23138.31112.88+0.90CSX ahead
2026-09-22136.55112.42+0.73CSX ahead
2026-09-21134.79110.46+0.83CSX ahead
2026-09-18138.04114.45+0.59CSX ahead
2026-09-17140.39115.72+0.72CSX ahead
2026-09-16140.39115.08+0.84CSX ahead
2026-09-15142.61116.34+0.95CSX ahead
2026-09-14143.35116.79+0.98CSX ahead
2026-09-11143.46116.51+1.05CSX ahead
2026-09-10143.73117.07+1.00CSX ahead
2026-09-09141.76116.65+0.80CSX ahead
2026-09-08143.61118.17+0.80CSX ahead
2026-09-04144.81118.65+0.90CSX ahead
2026-09-03143.58118.46+0.76CSX ahead
2026-09-02142.58118.69+0.59CSX ahead
2026-09-01142.73119.06+0.56CSX ahead
2026-08-31148.04123.17+0.61CSX ahead
2026-08-28150.29125.94+0.49near the usual relationship
2026-08-27151.06126.04+0.57CSX ahead
2026-08-26151.70127.25+0.48near the usual relationship
2026-08-25150.97126.83+0.46near the usual relationship
2026-08-24150.76126.94+0.42near the usual relationship
2026-08-21151.20126.20+0.58CSX ahead
2026-08-20149.38124.53+0.61CSX ahead
2026-08-19148.53123.64+0.64CSX ahead
2026-08-18147.25122.38+0.67CSX ahead
2026-08-17148.24122.86+0.73CSX ahead
2026-08-14147.01120.31+0.97CSX ahead
2026-08-13146.95122.00+0.70CSX ahead
2026-08-12146.78120.33+0.94CSX ahead
2026-08-11146.37119.98+0.95CSX ahead
2026-08-10146.89119.72+1.07CSX ahead
2026-08-07147.33120.09+1.08CSX ahead
2026-08-06148.59121.01+1.10CSX ahead
2026-08-05149.82121.07+1.26CSX ahead
2026-08-04149.56121.41+1.18CSX ahead
2026-08-03146.04119.31+1.07CSX ahead
2026-07-31147.71119.68+1.23CSX ahead
2026-07-30147.10118.58+1.34CSX ahead
2026-07-29148.71119.70+1.38CSX ahead
2026-07-28149.00120.63+1.28CSX ahead
2026-07-27151.82122.61+1.34CSX ahead
2026-07-24156.01125.90+1.36CSX ahead
2026-07-23154.78124.67+1.41CSX ahead
2026-07-22146.34119.85+1.10CSX ahead
2026-07-21146.22120.09+1.05CSX ahead
2026-07-20146.86121.36+0.94CSX ahead
2026-07-17148.74123.62+0.84CSX ahead
2026-07-16149.15122.66+1.04CSX ahead
2026-07-15144.87118.13+1.21CSX ahead
2026-07-14146.31118.11+1.41CSX ahead
2026-07-13145.49118.45+1.26CSX ahead
2026-07-10144.81117.56+1.31CSX ahead
2026-07-09144.64116.77+1.42CSX ahead
2026-07-08142.70115.09+1.45CSX ahead
2026-07-07142.17115.99+1.24CSX ahead
2026-07-06143.05115.77+1.39CSX ahead
2026-07-02143.29115.63+1.45CSX ahead
2026-07-01141.65113.78+1.54CSX ahead
2026-06-30139.30111.43+1.63CSX ahead
2026-06-29140.71111.72+1.77CSX ahead
2026-06-26139.68109.93+1.95CSX ahead
2026-06-25139.04109.68+1.92CSX ahead
2026-06-24134.99106.50+1.93CSX ahead
2026-06-23135.29105.94+2.09CSX ahead
2026-06-22135.40106.48+2.03CSX ahead
2026-06-18133.73105.24+2.04CSX ahead
2026-06-17133.56105.71+1.95CSX ahead
2026-06-16137.46109.57+1.84CSX ahead
2026-06-15138.89109.51+2.06CSX ahead
2026-06-12139.42111.72+1.78CSX ahead
2026-06-11138.82109.91+2.02CSX ahead
2026-06-10136.02109.39+1.74CSX ahead
2026-06-09138.57111.13+1.81CSX ahead
2026-06-08138.07110.07+1.94CSX ahead
2026-06-05137.72111.56+1.66CSX ahead
2026-06-04135.49108.11+1.95CSX ahead
2026-06-03136.11107.39+2.18CSX ahead
2026-06-02135.23108.43+1.90CSX ahead
2026-06-01134.41107.95+1.88CSX ahead
2026-05-29132.65107.60+1.71CSX ahead
2026-05-28134.26109.38+1.64CSX ahead
2026-05-27138.16114.46+1.35CSX ahead
2026-05-26136.61111.06+1.69CSX ahead
2026-05-22133.41108.92+1.62CSX ahead
2026-05-21134.53108.74+1.81CSX ahead
2026-05-20134.64108.89+1.81CSX ahead
2026-05-19135.05111.25+1.48CSX ahead
2026-05-18135.40112.71+1.30CSX ahead
2026-05-15133.82110.84+1.40CSX ahead
2026-05-14134.58110.34+1.58CSX ahead
2026-05-13130.13108.42+1.30CSX ahead
2026-05-12130.51108.81+1.29CSX ahead
2026-05-11131.13107.89+1.52CSX ahead
2026-05-08131.39108.42+1.47CSX ahead
2026-05-07130.30108.52+1.32CSX ahead
2026-05-06133.65109.89+1.53CSX ahead
2026-05-05131.98108.16+1.59CSX ahead
2026-05-04131.07107.91+1.52CSX ahead
2026-05-01132.15109.10+1.47CSX ahead
2026-04-30133.15110.40+1.41CSX ahead
2026-04-29130.95108.47+1.43CSX ahead
2026-04-28132.56109.68+1.45CSX ahead
2026-04-27133.24110.16+1.46CSX ahead
2026-04-24133.09110.08+1.46CSX ahead
2026-04-23135.35111.13+1.57CSX ahead
2026-04-22126.55102.17+1.82CSX ahead
2026-04-21127.11102.93+1.78CSX ahead
2026-04-20128.11103.31+1.84CSX ahead
2026-04-17126.96102.88+1.78CSX ahead
2026-04-16125.21102.86+1.58CSX ahead
2026-04-15123.39101.61+1.55CSX ahead
2026-04-14124.59103.25+1.47CSX ahead
2026-04-13124.12102.97+1.46CSX ahead
2026-04-10123.80102.63+1.47CSX ahead
2026-04-09124.53102.89+1.53CSX ahead
2026-04-08123.51102.05+1.53CSX ahead
2026-04-07121.40100.82+1.46CSX ahead
2026-04-06121.57100.59+1.52CSX ahead
2026-04-02120.81100.25+1.48CSX ahead
2026-04-01121.4599.60+1.64CSX ahead
2026-03-31120.3199.39+1.55CSX ahead
2026-03-30116.5698.00+1.33CSX ahead
2026-03-27116.2797.82+1.32CSX ahead
2026-03-26115.9197.99+1.27CSX ahead
2026-03-25115.9798.87+1.16CSX ahead
2026-03-24113.9298.19+1.03CSX ahead
2026-03-23114.1397.65+1.13CSX ahead
2026-03-20111.8796.24+1.07CSX ahead
2026-03-19112.8195.94+1.22CSX ahead
2026-03-18116.1896.92+1.47CSX ahead
2026-03-17118.1399.27+1.38CSX ahead
2026-03-16116.5999.23+1.23CSX ahead
2026-03-13115.1899.32+1.08CSX ahead
2026-03-12114.95100.00+0.97CSX ahead
2026-03-11118.23102.87+0.98CSX ahead
2026-03-10119.90102.50+1.19CSX ahead
2026-03-09118.99103.90+0.95CSX ahead
2026-03-06117.09104.10+0.74CSX ahead
2026-03-05120.60106.60+0.81CSX ahead
2026-03-04125.38109.26+0.99CSX ahead
2026-03-03125.03108.91+1.00CSX ahead
2026-03-02126.52109.37+1.10CSX ahead
2026-02-27125.12108.55+1.06CSX ahead
2026-02-26125.00108.75+1.04CSX ahead
2026-02-25123.74108.25+0.98CSX ahead
2026-02-24124.47109.24+0.95CSX ahead
2026-02-23123.01108.05+0.95CSX ahead
2026-02-20124.00109.01+0.95CSX ahead
2026-02-19122.16107.73+0.92CSX ahead
2026-02-18121.22108.56+0.75CSX ahead
2026-02-17120.25107.66+0.76CSX ahead
2026-02-13119.78106.79+0.81CSX ahead
2026-02-12119.28107.24+0.72CSX ahead
2026-02-11121.16107.66+0.86CSX ahead
2026-02-10119.87107.05+0.81CSX ahead
2026-02-09119.34104.20+1.08CSX ahead
2026-02-06119.02103.49+1.14CSX ahead
2026-02-05116.85103.01+0.99CSX ahead
2026-02-04116.79102.32+1.07CSX ahead
2026-02-03114.7498.93+1.26CSX ahead
2026-02-02112.5196.37+1.35CSX ahead
2026-01-30110.6796.31+1.17CSX ahead
2026-01-29110.9995.69+1.29CSX ahead
2026-01-28109.5593.29+1.45CSX ahead
2026-01-27110.4095.27+1.31CSX ahead
2026-01-26109.8294.59+1.34CSX ahead
2026-01-23107.3994.08+1.15CSX ahead
2026-01-22104.8794.78+0.79CSX ahead
2026-01-21107.0693.97+1.14CSX ahead
2026-01-20104.0790.82+1.22CSX ahead
2026-01-16106.2494.01+1.06CSX ahead
2026-01-15106.3994.43+1.04CSX ahead
2026-01-14106.0493.05+1.18CSX ahead
2026-01-13104.4393.93+0.89CSX ahead
2026-01-12103.2294.02+0.75CSX ahead
2026-01-09103.1793.58+0.80CSX ahead
2026-01-08103.5294.16+0.78CSX ahead
2026-01-07102.7391.96+0.97CSX ahead
2026-01-06105.7295.71+0.84CSX ahead
2026-01-05105.2595.03+0.88CSX ahead
2026-01-02106.3095.01+1.01CSX ahead
2025-12-31106.2494.76+1.04CSX ahead
2025-12-30106.7495.48+1.01CSX ahead
2025-12-29107.6296.08+1.04CSX ahead
2025-12-26107.3395.63+1.07CSX ahead
2025-12-24107.8096.29+1.05CSX ahead
2025-12-23107.2495.92+1.04CSX ahead
2025-12-22107.0996.11+1.01CSX ahead
2025-12-19106.9895.96+1.02CSX ahead
2025-12-18107.3096.03+1.05CSX ahead
2025-12-17106.9896.98+0.90CSX ahead
2025-12-16107.8596.63+1.05CSX ahead
2025-12-15108.9798.51+0.95CSX ahead
2025-12-12109.5898.30+1.05CSX ahead
2025-12-11108.8896.73+1.18CSX ahead
2025-12-10108.7096.46+1.20CSX ahead
2025-12-09106.5994.86+1.17CSX ahead
2025-12-08106.5496.45+0.96CSX ahead
2025-12-05106.3996.40+0.95CSX ahead
2025-12-04106.0497.21+0.80CSX ahead
2025-12-03105.3696.37+0.83CSX ahead
2025-12-02102.4995.14+0.65CSX ahead
2025-12-01102.1494.78+0.66CSX ahead
2025-11-28103.6394.97+0.81CSX ahead
2025-11-26103.4694.49+0.86CSX ahead
2025-11-25102.2993.87+0.80CSX ahead
2025-11-24100.7991.97+0.88CSX ahead
2025-11-21100.4792.68+0.74CSX ahead
2025-11-2098.7190.62+0.80CSX ahead
2025-11-1999.5390.61+0.91CSX ahead
2025-11-1899.6290.46+0.94CSX ahead
2025-11-1799.6890.54+0.94CSX ahead
2025-11-14102.2991.36+1.15CSX ahead
2025-11-13102.2390.73+1.24CSX ahead
2025-11-12103.7291.58+1.31CSX ahead
2025-11-11102.5292.09+1.10CSX ahead
2025-11-10102.9391.72+1.21CSX ahead
2025-11-07103.5890.73+1.43CSX ahead
2025-11-06103.0589.30+1.58CSX ahead
2025-11-05103.5289.05+1.69CSX ahead
2025-11-04105.0490.50+1.69CSX ahead
2025-11-03105.0189.64+1.82CSX ahead
2025-10-31105.5790.28+1.82CSX ahead
2025-10-30104.4589.65+1.79CSX ahead
2025-10-29103.4688.64+1.83CSX ahead
2025-10-28104.5789.14+1.92CSX ahead
2025-10-27105.5189.40+2.02CSX ahead
2025-10-24105.8988.74+2.20CSX ahead
2025-10-23104.1390.14+1.78CSX ahead
2025-10-22105.2892.27+1.63CSX ahead
2025-10-21104.7292.81+1.49CSX ahead
2025-10-20107.4793.12+1.82CSX ahead
2025-10-17107.2792.60+1.89CSX ahead
2025-10-16105.4891.78+1.80CSX ahead
2025-10-15106.2192.47+1.80CSX ahead
2025-10-14105.8993.03+1.69CSX ahead
2025-10-13104.2592.52+1.56CSX ahead
2025-10-10104.0292.36+1.57CSX ahead
2025-10-09105.6694.85+1.42CSX ahead
2025-10-08105.3695.31+1.32CSX ahead
2025-10-07105.4894.99+1.39CSX ahead
2025-10-06106.2497.26+1.16CSX ahead
2025-10-03105.5497.01+1.11CSX ahead
2025-10-02104.2596.08+1.08CSX ahead
2025-10-01102.5896.17+0.83CSX ahead
2025-09-30104.0796.83+0.95CSX ahead
2025-09-29105.0196.76+1.10CSX ahead
2025-09-2699.6896.35+0.40near the usual relationship
2025-09-2599.0095.04+0.50CSX ahead
2025-09-2499.1294.37+0.63CSX ahead
2025-09-2399.8593.40+0.89CSX ahead
2025-09-2297.3092.52+0.66CSX ahead
2025-09-1996.6690.38+0.91CSX ahead
2025-09-1897.9890.27+1.14CSX ahead
2025-09-1796.0488.97+1.07CSX ahead
2025-09-1695.1688.49+1.02CSX ahead
2025-09-1595.2588.59+1.02CSX ahead
2025-09-1295.1688.04+1.11CSX ahead
2025-09-1196.2888.50+1.21CSX ahead
2025-09-1093.9388.16+0.91CSX ahead
2025-09-0994.3788.51+0.93CSX ahead
2025-09-0895.0589.00+0.96CSX ahead
2025-09-0595.3490.25+0.80CSX ahead
2025-09-0495.7291.38+0.68CSX ahead
2025-09-0394.6190.85+0.60CSX ahead
2025-09-0294.3490.94+0.55CSX ahead
2025-08-2995.2891.59+0.59CSX ahead
2025-08-2895.7291.09+0.75CSX ahead
2025-08-2795.3790.52+0.80CSX ahead
2025-08-2694.9991.25+0.62CSX ahead
2025-08-2596.1691.49+0.77CSX ahead
2025-08-22101.3593.34+1.26CSX ahead
2025-08-21105.1392.30+2.01CSX ahead
2025-08-20105.4892.45+2.06CSX ahead
2025-08-19107.0391.67+2.45CSX ahead
2025-08-18105.4890.16+2.52CSX ahead
2025-08-15106.4590.45+2.66CSX ahead
2025-08-14106.5490.75+2.67CSX ahead
2025-08-13105.7491.43+2.46CSX ahead
2025-08-12104.9889.64+2.72CSX ahead
2025-08-11103.2589.98+2.41CSX ahead
2025-08-08103.8491.04+2.34CSX ahead
2025-08-07103.3191.22+2.26CSX ahead
2025-08-06105.5492.36+2.44CSX ahead
2025-08-05104.4891.34+2.50CSX ahead
2025-08-04103.9390.97+2.52CSX ahead
2025-08-01102.6189.88+2.54CSX ahead
2025-07-31104.1690.93+2.64CSX ahead
2025-07-30103.4392.29+2.28CSX ahead
2025-07-29103.8191.67+2.50CSX ahead
2025-07-28104.6693.91+2.24CSX ahead
2025-07-25104.8192.07+2.68CSX ahead
2025-07-24102.5890.34+2.68CSX ahead
2025-07-23102.4994.63+1.78CSX ahead
2025-07-22103.2593.91+2.09CSX ahead
2025-07-21100.7092.52+1.91CSX ahead
2025-07-18100.7992.12+2.03CSX ahead
2025-07-17101.1193.20+1.87CSX ahead
2025-07-1697.4894.71+0.83CSX ahead
2025-07-1598.1294.69+0.96CSX ahead
2025-07-1499.5995.58+1.07CSX ahead
2025-07-1199.9496.31+0.99CSX ahead
2025-07-1098.3097.09+0.50CSX ahead
2025-07-0997.6896.88+0.41near the usual relationship
2025-07-0897.8696.90+0.44near the usual relationship
2025-07-0796.8696.42+0.33near the usual relationship
2025-07-0398.4896.80+0.57CSX ahead
2025-07-0298.5197.16+0.50CSX ahead
2025-07-0198.0996.51+0.54CSX ahead
2025-06-3095.6394.26+0.50CSX ahead
2025-06-2796.4594.80+0.55CSX ahead
2025-06-2695.4693.97+0.52CSX ahead
2025-06-2595.2292.92+0.68CSX ahead
2025-06-2495.1993.37+0.58CSX ahead
2025-06-2395.0292.54+0.71CSX ahead
2025-06-2093.9691.16+0.78CSX ahead
2025-06-1894.4990.95+0.93CSX ahead
2025-06-1794.1490.37+0.98CSX ahead
2025-06-1695.4392.03+0.89CSX ahead
2025-06-1394.1491.51+0.74CSX ahead
2025-06-1294.9392.38+0.72CSX ahead
2025-06-1194.7292.47+0.66CSX ahead
2025-06-1095.5792.83+0.76CSX ahead
2025-06-0993.7391.82+0.59CSX ahead
2025-06-0694.4691.53+0.80CSX ahead
2025-06-0593.0290.39+0.74CSX ahead
2025-06-0493.5890.48+0.84CSX ahead
2025-06-0393.3890.86+0.72CSX ahead
2025-06-0291.5689.67+0.59CSX ahead
2025-05-3092.5890.81+0.56CSX ahead
2025-05-2992.0991.16+0.39near the usual relationship
2025-05-2891.8591.02+0.36near the usual relationship
2025-05-2792.1291.91+0.23near the usual relationship
2025-05-2390.3390.99+0.06near the usual relationship
2025-05-2289.8091.30-0.12near the usual relationship
2025-05-2189.3691.61-0.27near the usual relationship
2025-05-2091.5393.54-0.21near the usual relationship
2025-05-1991.4794.02-0.32near the usual relationship
2025-05-1691.7994.81-0.41near the usual relationship
2025-05-1591.7494.57-0.38near the usual relationship
2025-05-1490.9493.54-0.34near the usual relationship
2025-05-1389.5193.51-0.63UNP ahead
2025-05-1288.8394.58-0.99UNP ahead
2025-05-0984.2388.62-0.78UNP ahead
2025-05-0884.8888.83-0.68UNP ahead
2025-05-0783.1587.61-0.81UNP ahead
2025-05-0682.3387.34-0.95UNP ahead
2025-05-0583.4488.71-1.00UNP ahead
2025-05-0284.1189.43-1.00UNP ahead
2025-05-0182.3987.70-1.03UNP ahead
2025-04-3082.2788.35-1.21UNP ahead
2025-04-2982.2187.89-1.13UNP ahead
2025-04-2881.6887.10-1.09UNP ahead
2025-04-2581.5987.38-1.18UNP ahead
2025-04-2482.4788.26-1.18UNP ahead
2025-04-2380.8690.04-1.95UNP ahead
2025-04-2281.4288.86-1.58UNP ahead
2025-04-2180.4888.51-1.75UNP ahead
2025-04-1781.1390.23-1.98UNP ahead
2025-04-1680.1688.73-1.91UNP ahead
2025-04-1581.7790.16-1.85UNP ahead
2025-04-1482.8591.06-1.81UNP ahead
2025-04-1182.0989.55-1.68UNP ahead
2025-04-1081.5489.85-1.89UNP ahead
2025-04-0984.0091.57-1.70UNP ahead
2025-04-0878.2285.32-1.73UNP ahead
2025-04-0779.4086.02-1.61UNP ahead
2025-04-0479.7587.37-1.84UNP ahead
2025-04-0382.0391.75-2.28UNP ahead
2025-04-0287.1697.69-2.35UNP ahead
2025-04-0186.5897.16-2.41UNP ahead
2025-03-3186.2596.78-2.44UNP ahead
2025-03-2885.3295.10-2.34UNP ahead
2025-03-2787.6996.67-2.14UNP ahead
2025-03-2687.6397.51-2.36UNP ahead
2025-03-2586.5596.60-2.45UNP ahead
2025-03-2487.4996.35-2.20UNP ahead
2025-03-2186.6695.81-2.31UNP ahead
2025-03-2087.8796.19-2.12UNP ahead
2025-03-1988.1396.84-2.23UNP ahead
2025-03-1888.6997.13-2.19UNP ahead
2025-03-1788.8997.44-2.23UNP ahead
2025-03-1487.9597.31-2.47UNP ahead
2025-03-1385.3895.98-2.86UNP ahead
2025-03-1286.6197.29-2.90UNP ahead
2025-03-1186.5297.41-3.00UNP ahead
2025-03-1089.83101.72-3.20UNP ahead
2025-03-0791.62102.13-2.89UNP ahead
2025-03-0690.65100.48-2.81UNP ahead
2025-03-0590.6299.80-2.71UNP ahead
2025-03-0491.4498.94-2.32UNP ahead
2025-03-0393.58100.70-2.22UNP ahead
2025-02-2893.82101.06-2.28UNP ahead
2025-02-2793.82100.40-2.15UNP ahead
2025-02-2693.73100.57-2.24UNP ahead
2025-02-2594.05100.73-2.23UNP ahead
2025-02-2493.2399.27-2.11UNP ahead
2025-02-2194.67100.59-2.09UNP ahead
2025-02-2095.13101.45-2.20UNP ahead
2025-02-1994.99101.21-2.21UNP ahead
2025-02-1898.59102.90-1.71UNP ahead
2025-02-1497.80102.10-1.73UNP ahead
2025-02-1397.01102.81-2.14UNP ahead
2025-02-1296.48101.81-2.06UNP ahead
2025-02-1197.04101.49-1.85UNP ahead
2025-02-1096.95100.09-1.53UNP ahead
2025-02-0795.5299.17-1.69UNP ahead
2025-02-0695.9699.76-1.74UNP ahead
2025-02-0596.37100.16-1.75UNP ahead
2025-02-0496.3499.75-1.67UNP ahead
2025-02-0395.2899.56-1.93UNP ahead
2025-01-3196.34101.51-2.19UNP ahead
2025-01-3096.31102.38-2.47UNP ahead
2025-01-2996.66102.23-2.36UNP ahead
2025-01-2895.78102.07-2.62UNP ahead
2025-01-2798.59104.23-2.43UNP ahead
2025-01-2495.81101.92-2.65UNP ahead
2025-01-2398.68101.62-1.74UNP ahead
2025-01-2297.4296.60-0.65UNP ahead
2025-01-2197.5196.98-0.74UNP ahead
2025-01-1795.9395.97-0.92UNP ahead
2025-01-1696.6396.23-0.79UNP ahead
2025-01-1595.1394.58-0.74UNP ahead
2025-01-1494.2093.97-0.85UNP ahead
2025-01-1393.4692.90-0.75UNP ahead
2025-01-1093.1492.26-0.65UNP ahead
2025-01-0894.3794.97-1.12UNP ahead
2025-01-0794.3494.44-0.97UNP ahead
2025-01-0693.7994.23-1.09UNP ahead
2025-01-0394.7894.84-0.97UNP ahead
2025-01-0294.2693.86-0.83UNP ahead
2024-12-3194.5893.42-0.59UNP ahead
2024-12-3094.2393.32-0.67UNP ahead
2024-12-2795.1394.20-0.66UNP ahead
2024-12-2695.3194.32-0.65UNP ahead
2024-12-2495.4694.12-0.54UNP ahead
2024-12-2394.4393.05-0.53UNP ahead
2024-12-2093.3592.72-0.76UNP ahead
2024-12-1992.5691.42-0.60UNP ahead
2024-12-1894.0291.99-0.32near the usual relationship
2024-12-1796.5194.17-0.24near the usual relationship
2024-12-1696.5495.41-0.61UNP ahead
2024-12-1397.4296.26-0.61UNP ahead
2024-12-1298.7195.74-0.06near the usual relationship
2024-12-1198.5195.77-0.13near the usual relationship
2024-12-10100.1597.13-0.06near the usual relationship
2024-12-0999.5695.67+0.21near the usual relationship
2024-12-06100.9795.69+0.62CSX ahead
2024-12-05101.4796.12+0.64CSX ahead
2024-12-04103.4696.27+1.17CSX ahead
2024-12-03105.5197.09+1.51CSX ahead
2024-12-02106.5198.64+1.33CSX ahead
2024-11-29107.12100.23+1.04CSX ahead
2024-11-27107.21100.46+1.00CSX ahead
2024-11-26107.53100.63+1.04CSX ahead
2024-11-25107.33102.14+0.54CSX ahead
2024-11-22104.8799.30+0.69CSX ahead
2024-11-21103.5897.92+0.75CSX ahead
2024-11-20101.3295.68+0.78CSX ahead
2024-11-19101.4195.57+0.85CSX ahead
2024-11-18102.4996.03+1.03CSX ahead
2024-11-15102.9696.51+1.03CSX ahead
2024-11-14104.4396.51+1.46CSX ahead
2024-11-13106.9298.49+1.57CSX ahead
2024-11-12105.8997.87+1.48CSX ahead
2024-11-11107.0399.12+1.43CSX ahead
2024-11-08105.5198.93+1.06CSX ahead
2024-11-07104.2299.37+0.55CSX ahead
2024-11-06108.09101.80+0.94CSX ahead
2024-11-0599.7195.81+0.32near the usual relationship
2024-11-0497.7794.19+0.24near the usual relationship
2024-11-0197.8695.33-0.10near the usual relationship
2024-10-3198.5995.07+0.22near the usual relationship
2024-10-3098.3095.11+0.11near the usual relationship
2024-10-2997.4595.04-0.13near the usual relationship
2024-10-2897.4895.03-0.12near the usual relationship
2024-10-2597.5194.35+0.11near the usual relationship
2024-10-2497.0194.53-0.11near the usual relationship
2024-10-2398.4598.87-1.04UNP ahead
2024-10-2299.2198.91-0.83UNP ahead
2024-10-2198.6598.46-0.86UNP ahead
2024-10-18100.00100.00-0.93UNP ahead

One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Jul 17, 2025 (CSX +3.7%, UNP -1.6%); Jul 24, 2025 (CSX +0.1%, UNP -4.5%); Aug 22, 2025 (CSX -3.6%, UNP +1.1%); Sep 29, 2025 (CSX +5.3%, UNP +0.4%).

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: +11.58% per trade on average after costs, 2 won.

LegsEnteredExitedWhyDaysBefore costsCosts + borrowAfter costs
Long UNP · Short CSXNov 6, 2020Feb 24, 2022converged475$1,142.48-$102.96$1,167.15 (+11.67%)
Long CSX · Short UNPAug 13, 2020Oct 23, 2020converged71$1,222.39-$54.22$1,149.34 (+11.49%)

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

The companies

CSX and UNP at a glance

CSX CSX Corporation

Listing
Nasdaq · SEC CIK 277948
Industry
Railroads · SIC 4011 Railroads, Line-Haul Operating
Market value
$88.7B
Price history
2,521 daily closes, Oct 12, 2016 to Oct 22, 2026

UNP Union Pacific Corporation

Listing
NYSE · SEC CIK 100885
Industry
Railroads · SIC 4011 Railroads, Line-Haul Operating
Market value
$170.5B
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
CSX / CPWatchlistCSX by 1.92 sdRailroads
UNP / CPWatchlistUNP by 1.63 sdRailroads

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
ScoutMarket PulseNarrativesDigestWave

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.