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Article 6 · Shorting the −3x

Does shorting SQQQ after rallies pay?

Shorting the −3x beat cash because it was long equities, not because of decay, and sometimes it wiped out the account.

Read the full article on Substack (in Spanish)

An educational tool, not investment advice. Historical figures, computed with the Modeler's engine; past performance does not guarantee future results.

If I short the −3x and hold it, do I earn more than by buying the +3x?

32%median gain of the short
21%that of the long +3x
12%of windows, the short is wiped out
How long you hold it → median gain of the short
Total gain over the window (p5, p25, p50, p75, p95)

Every session since 1928 is a short sale of the S&P 500 −3x for all the capital; the −100% bar is ruin.

How it's computed

24,530 windows since Jan 3, 1928, only 98 independent. Data through Aug 31, 2026.

Main figure: matches the article From the article: S&P 500 since 1928, over one year: the short's median (32%) beats the +3x's (21%); 12% of windows end in ruin. The Modeler gives the same figure (32%).

Open it in the Modeler

Does shorting the −3x after a rally beat leaving the money in T-bills?

+5.8points of growth a year over T-bills
9.5%a year, the rule
−78.5%the rule's worst drawdown
Minimum rally → points of growth a year over T-bills
Wealth of $1 invested (log scale)

The rule shorts the −3x when the index has risen over 21 sessions and is above its 200-day average, and holds it for 21 sessions.

How it's computed

Real history from October 1928 to July 2026, in whole months. Data through Jul 31, 2026.

Main figure: differs from the article From the article: The best S&P 500 rule since 1928 (+3% in 21 sessions, above the average, 21 sessions) has beaten cash by +5.7 points a year. The Modeler gives +5.8 with data through Jul 31, 2026 and whole months.

Open it in the Modeler