Morning Brief: WTI at $101.61 Ahead of the Fed Decision and GDP/PCE

A Gann-style date is a hypothesis about when to inspect returns, not evidence that the returns must rise. The usual average abnormal return can be moved by one extreme observation. MacKinlay's discussion of Corrado's rank test offers a second lens: for each security, order its abnormal returns across a fixed event window, then note the rank occupied by the event-day return. Under the no-effect hypothesis the expected event-day rank is the midpoint, (L₂ + 1)/2, for a window containing L₂ observations. One security's top rank is an observation, not a population result. The test aggregates deviations from that midpoint across securities and scales by their rank variability; it does not simply count winners. For a pre-registered seasonal checkpoint, freeze the proxy, normal-return model, event-window length, and event date before inspecting bars. A ranked event day can reveal whether an unusually large move survives a check that is less tied to a parametric return distribution. Compare it with a conventional abnormal-return test instead of replacing one favored statistic with another after seeing the chart. The method does not turn Gann's calendar into a causal mechanism, and assets sharing the same macro shock are not independent confirmations.

Try it

In a hypothetical five-observation event window, two independent proxies have event-day abnormal-return ranks 5 and 4. What is the null midpoint rank, the mean event rank, and their difference? Is that difference by itself a significance test?

Limits

A rank is not an abnormal-return magnitude and one or two high ranks do not prove a seasonal response. The complete test needs a fixed window, defined normal-return model, sufficient independent events and its sampling variance. Shared-date market shocks undermine naive independence.

Source

A. Craig MacKinlay, Event Studies in Economics and Finance, Section 8, Nonparametric Tests, printed p. 32; Corrado (1989) rank test discussion and equations 24-25. Peer-reviewed Journal of Economic Literature 35(1), 1997, pp. 13-39; public court exhibit reproduction. Applying the test to Gann dates is an editorial research design, not an empirical finding.

Today

At the Oct 28 00:00 UTC completed boundary, the Oct 27 BTC candle closed $80,799.51 and ETH $2,347.01. The five paired BTC-minus-ETH daily return differences, smallest first, place the Oct 27 mark at rank 2 versus midpoint 3 (-1 ranks). Plot that Oct 28 00:00 UTC boundary and BTC close together; one correlated proxy rank is not Corrado significance or a price forecast. Coinbase BTC-USD versus ETH-USD, six completed UTC daily closes, Latest session 2026-10-28T00:00:00Z: For each of five aligned days: 100*(BTC_close_t/BTC_close_(t-1)-1) - 100*(ETH_close_t/ETH_close_(t-1)-1); rank five differences ascending, compare last completed day rank with (5+1)/2 = 3. = -1.0 ranks (inputs: btc_close_2026_10_27_usd=80799.51, eth_close_2026_10_27_usd=2347.01, event_mark_rank=2, null_midpoint_rank=3, paired_completed_returns=5, paired_relative_return_1_pct=-0.2197634614266919, paired_relative_return_2_pct=0.8367506151045201, paired_relative_return_3_pct=0.3275735178523642, paired_relative_return_4_pct=0.22006589584580016, paired_relative_return_5_pct=-0.1611091074083193, signed_rank_deviation=-1). Data source 1 Data source 2

Horizons observer-table quantity 41 gives apparent true anomaly: the angle in Mars's instantaneous orbit plane from the periapse direction to Mars, increasing with orbital motion. Periapse is an orbital-distance reference, not Aries and not the Sun's apparent zodiac longitude. Horizons computes the target position at the earlier moment when the light later received by the observer left it. State the observer and print time when using the output. A value of 357 degrees followed by 2 degrees has moved forward five degrees through the 360-degree seam. Subtracting naively would report negative 355 degrees, a false reversal. The two-day sequence therefore needs an unwrapped difference, although neither number says what Bitcoin should do. To test a timed market comparison, pair each UTC ephemeris epoch with a completed BTC-USD daily candle close at that exact boundary. Store the ephemeris method, close timestamp, both values, and a predeclared event definition. A near-zero anomaly can mark orbital geometry; it is not a price signal.

Try it

Synthetic Mars true-anomaly samples are 357 degrees and 2 degrees one day apart. Find the forward angular change across zero.

Limits

True anomaly is an orbital-angle measurement. Horizons quantity 41 uses a light-time-shifted target position; it cannot by itself establish a planetary aspect, a near-term market edge, or a price response.

Source

NASA/JPL Horizons Manual, Observer Table, quantity 41, True anomaly angle (Tru_Anom). NASA/JPL Solar System Dynamics technical documentation. Its ephemeris is astronomical output, not a market signal.

Today

JPL Horizons quantity 41 for geocentric Mars at the Oct 27 and 28 00:00 UTC boundaries is 121.9039° then 122.3827°, a forward change of 0.4788°. Coinbase BTC daily closes aligned at those same endpoints are $80,008.79 and $80,799.51 (+0.988%). Put each UTC boundary with its BTC close on the same chart. The orbital angle does not explain or predict BTC. JPL Horizons Mars observer true anomaly and Coinbase BTC-USD completed daily closes, Latest session 2026-10-28T00:00:00Z: Forward Mars true-anomaly change = (anomaly_2026-10-28 - anomaly_2026-10-27 + 360) mod 360; BTC price change = 100*(completed Oct 27 BTC candle close / completed Oct 26 candle close - 1). = 0.47879999999997835 degrees (inputs: btc_close_at_2026_10_27_00_utc_usd=80008.79, btc_close_at_2026_10_28_00_utc_usd=80799.51, btc_price_change_pct=0.988291411481157, mars_true_anomaly_2026_10_27_degrees=121.9039, mars_true_anomaly_2026_10_28_degrees=122.3827). Data source 1 Data source 2