Morning Brief: Friday New in Libra Map Tests $82,479 BTC, $90.83 WTI, SPCX, and STRC Yield into Existing Home Sales MoM

Five-minute bars share a duration, but not necessarily a normal level of activity. Andersen and Bollerslev's intraday study shows why that matters. Their historical foreign-exchange and equity-index samples contain strong time-of-day patterns in volatility. A repeated burst around an opening session may therefore describe the trading schedule rather than an independent countdown from a pivot. Build separate records for regular trading and overnight trading. Within each record, compare like clock-time intervals. A simple teaching statistic divides today's absolute interval return by the mean absolute return at that same interval on earlier comparable sessions. This ratio is an editorial diagnostic, not the authors' fitted model. Suppose an opening interval moves 0.30 percent against a usual 0.25 percent, while a midday interval moves 0.15 percent against a usual 0.05 percent. The opening move is larger in raw terms. Relative to its own baseline, however, midday is more unusual. Neither ratio establishes direction. Specify the exchange timezone and daylight-saving treatment before matching intervals, and do not merge a shortened holiday session with a full trading day.

Try it

Synthetic intervals: opening absolute return 0.30%, opening baseline 0.25%; midday absolute return 0.15%, midday baseline 0.05%. Compute both ratios and identify the more unusual relative move.

Limits

A mean absolute-return ratio is not a significance test or a forecast. Intraday samples can contain stale prints, missing bars, and changing microstructure. The source studies historical DM/USD and S&P futures, not modern SPY or crypto.

Source

Andersen and Bollerslev, Intraday Periodicity, Section 2, Intraday return periodicity, printed pp. 118-124; introduction p. 116. Peer-reviewed Journal of Empirical Finance 4, 1997, pp. 115-158. Publisher-format PDF, with authorship and abstract checked at Duke Scholars. Five-minute DM/USD sample October 1992-September 1993; S&P 500 futures January 1986-December 1989. Editorial examples do not replicate the fitted model.

Today

The latest completed SPY regular session's 12:00–12:05 ET move was 0.25 times its 10-session same-clock baseline, so the interval was below normal relative activity rather than a standalone direction signal. SPY 5-minute regular-session bars, Latest session 2026-10-08T16:05:00Z: observed_abs_return_pct / baseline_mean_abs_return_pct = 0.25 x same-clock baseline (inputs: baseline_mean_abs_return_pct=0.041305, baseline_session_count=10, observed_abs_return_pct=0.010325, prior_10_abs_return_pct=0.012886, prior_1_abs_return_pct=0.020939, prior_2_abs_return_pct=0.17152, prior_3_abs_return_pct=0.024821, prior_4_abs_return_pct=0.060271, prior_5_abs_return_pct=0.020818, prior_6_abs_return_pct=0.055879, prior_7_abs_return_pct=0.003903, prior_8_abs_return_pct=0.040735, prior_9_abs_return_pct=0.001274). Data source 1 Data source 2

Right ascension measures eastward along the celestial equator. Ecliptic longitude measures along the ecliptic. Horizons defines the two separately, so an equality of right ascension is not automatically a conjunction in zodiac longitude. The coordinate choice changes the event being tested. Right ascension can be printed in hours or degrees. A full circle contains 24 hours of right ascension, so one hour corresponds to 15 degrees. Wraparound also matters. Two hypothetical bodies at 23 hours 58 minutes and 0 hours 2 minutes are four minutes of right ascension apart across zero, equivalent to one degree. Subtracting the printed hours without wrapping would suggest almost a full circle. Even exact equality of right ascension does not establish zero sky separation. If the declinations are plus 10 and minus 10 degrees, the bodies remain 20 degrees apart on the same meridian. Keep declination alongside the right-ascension result. A two-column coordinate table makes this distinction visible before anyone labels the contact as a conjunction.

Try it

Find the shorter right-ascension gap between 23h58m and 0h02m in minutes and degrees. At equal right ascension, how far apart are declinations +10 and -10 degrees?

Limits

These are invented teaching coordinates. A right-ascension contact is a defined astronomical measurement, not evidence of astrological or financial causation.

Source

JPL Horizons manual, General definitions, RA and DEC entries; observer quantities 2 and 31. Primary institutional astronomy reference. Worked examples are explicitly hypothetical, not observed market effects.

Today

At the BTC minute close, the Moon/Venus right-ascension gap was 32.43°, while their ecliptic-longitude gap was 36.18°, showing the coordinate-axis distinction beside the same price timestamp. BTC-USD synchronized with Moon/Venus Horizons rows, As of 2026-10-09T11:00:00Z: abs(((moon_ra_deg - venus_ra_deg + 180) % 360) - 180) = 32.4274 degrees of right ascension (inputs: ecliptic_longitude_gap_deg=36.180207, moon_ecliptic_longitude_deg=181.563863, moon_ra_deg=180.33482, price_usd=82488.29, ra_gap_deg=32.42739, venus_ecliptic_longitude_deg=217.74407, venus_ra_deg=212.76221). Data source 1 Data source 2 Data source 3 Data source 4