Research brief 001

Six days. One month-end pressure point. Can momentum be timed?

The paper reports a sharp contrast in loser-stock returns inside and outside a six-day window. What survives a portfolio test?

The idea worth investigating

Investors need cash on a calendar. The stocks they sell may follow a pattern. Nathan, Suominen and Tasa connect month-end funding needs to pressure on recent losers.

The full analysis examines the study and the practical question behind it: The paper reports a sharp contrast in loser-stock returns inside and outside a six-day window. What survives a portfolio test?

Includes a partial replication; the full analysis separates author findings from our test.

Paid analysis on Substack

See what changes the investment case.

The headline is the starting point. The subscriber analysis takes you through:

  • The published factor comparison
  • The stock portfolio, weights and cost hurdles
  • Our verdict on the calendar-specific trade
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