Pair divergences

Statistics of related stocks. Shares of one issuer or one industry usually keep a stable price ratio; when one of them becomes noticeably dearer or cheaper relative to the other, it is a rare state - a strong divergence. These are observed statistics, not a trading recommendation. The table lists pairs whose ratio stability is confirmed by a statistical test, along with how far each one has moved from its usual state today.

13 pairs on watch
26 median days for the gap to halve
Where the pairs are now as of 26.10.2026, closing prices
−3σ−2σusual+2σ+3σ
shaded edges - strong divergence, from 2σ
Closest to a strong divergence: TATN / SNGS, 1.28σ - 0.72σ to go before the threshold.
Strong divergences
No strong divergences yet. A divergence is recorded when a pair's deviation reaches 2σ and appears here together with its outcome.
Pairs on watch
Pair Link? Deviation? Gap, %? Divergence? Convergence? Reliability?
TATN / SNGS oil +1.28σ +10.8% within the normal range 34 days confirmed
SBER / T banks +1.02σ +4.4% within the normal range 19 days confirmed
MTLR / MTLRP common and pref −0.85σ −3.7% within the normal range 16 days high
SNGS / SNGSP common and pref −0.56σ −6.0% within the normal range 50 days by share type
ROSN / SNGS oil +0.50σ +3.2% within the normal range 26 days confirmed
TATNP / LKOH oil +0.46σ +2.9% within the normal range 28 days confirmed
NLMK / CHMF steel −0.38σ −2.0% within the normal range 19 days high
SBER / SBERP common and pref −0.34σ −0.1% within the normal range 9 days high
TATN / LKOH oil +0.30σ +2.1% within the normal range 29 days confirmed
RTKMP / RTKM common and pref −0.22σ −1.0% within the normal range 32 days by share type
TATN / TATNP common and pref −0.22σ −0.5% within the normal range 25 days by share type
BSPB / BSPBP common and pref +0.07σ +0.9% within the normal range 45 days by share type
T / SVCB banks −0.04σ −0.3% within the normal range 26 days confirmed

How pairs are selected. Cointegration is checked with the Engle-Granger test on the residual of a regression of log prices over three years. The selection threshold is a test statistic no higher than −3.37; for a common/preferred pair of the same issuer it is softer (−2.5): their link follows from being one business with one set of accounts, not from statistics. The result is shown in the Reliability column.

How the observation works. A divergence is recorded when the pair's deviation at the daily close reaches 2σ. The observation ends when the ratio returns to normal ("converged"), when the deviation widens to 3.5σ ("widened") or when 2 times as many days have passed as in the "Convergence" column ("did not converge"). A pair is marked again only after its deviation has been back below the threshold. These are statistics of the pair's behaviour, not a trading recommendation.

Limitations. Calculated on daily closing prices as of 26.10.2026, updated after the close. A statistical link can break down: a pair can diverge further and never return to its usual ratio.

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