Seasonal window, then weekly breadth

Seasonal maps and participation

First-edition seasonal maps organized what tends to happen during the day, week, and month as repeatable calendar procedures rather than as isolated forecasts. The maps marked a seasonal regime across the year instead of issuing a one-off call.

Breadth work sat next to that calendar. Early composite indicator work combined the advance-decline line, short interest, odd-lot short sales, and new highs and lows as participation inputs. The advance-decline line was the series used to judge whether participation matched the averages.

Holding windows on large-cap and Nasdaq maps

A seasonal calendar treated November through April as the stronger consecutive six-month holding window versus the other half of the year. That best six months split was the large-cap version of an invested half-year against a cash-like summer half.

Average monthly change charts from 1950 were used to argue that fall and winter were stronger invested windows than summer cash-like periods.

The same monthly seasonal maps applied to Nasdaq showed a longer strong stretch into May and June and a four-month weak stretch from July through October, unlike the large-cap six-month split. A Nasdaq idea and a large-cap idea did not share the same seasonal regime.

January as a year marker and the December small-cap window

January's direction was framed as a full-year regime marker. That January barometer treated the month's market direction as a clue to the rest of that calendar year. The association was described as tightening after the 1930s change in when a newly elected Congress convened.

A small-cap loading window was placed around mid-December. That year-end window is the stretch tracked as a small-cap seasonal loading period. The January effect, the tendency for smaller stocks to lead early in the year, was described as having shifted earlier into December.

Why weekly breadth was preferred

Weekly cumulative advance-decline was preferred to the daily series. One-day spurts followed by multi-day drift can make the daily line look weaker than the week's net change. Weekly breadth was the reading used when daily spurts distorted the tape.

A broad small-stock decline with market makers stepping back was cited as the reason the advance-decline line looked poor even when large-cap averages were treated as already having had their own bear markets. Participation could look weak while the averages did not.