Why we scan twice a day, not in real time

The instinct is that faster is better — that if a little data is good, a live stream of it must be an edge. For the way an individual actually makes decisions, the opposite is closer to true. Unfair Signals scans the full US market exactly twice a trading day, at 9:45 AM ET and 3:30 PM ET, and the cadence is a feature, not a limitation.

Real-time is mostly noise tax

An always-on feed doesn’t give you more signal. It gives you the same signal buried in vastly more noise, plus a behavioral cost: every blip invites a decision, and most of those decisions are wrong. The cost of real-time isn’t the data fee. It’s the trades you make because the screen was blinking.

Why these two windows

• 9:45 AM ET — fifteen minutes after the open, the overnight news, pre-market filings, and opening auction have resolved into something readable. Early enough to act on the day, late enough that the open’s chaos has cleared.
• 3:30 PM ET — half an hour before the close, when the day’s flow, filings, and price action have accumulated enough to mean something, and there’s still time to act before the bell.

Two reads a day is enough to catch what matters and infrequent enough that you aren’t whipsawed by what doesn’t.

What the cadence buys you

The windows force the system — and you — to act on settled information. A filing that hit at 11:00 AM is read in context at 3:30, not reacted to at 11:00:04. By the second window, a morning’s worth of flow either confirmed a move or faded, and “faded” is one of the most useful things you can learn about a name.

This is the same reason the product is invite-only and the calls are few. The discipline isn’t in seeing everything. It’s in choosing what to look at, and when. Conviction over coverage applies to the clock, too.

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Research, not advice. Scan times are subject to change around market holidays and data availability.