Turn of the Month Trading Strategy - Ultimo Effect

Capitalize on the Turn of the Month (Ultimo Effect) in S&P 500. This strategy buys at the end of the month and exits early next month.

Published · Updated · Methodology: Technical Indicators

Part of: Algorithmic & Automated Trading

  • Methodology: Technical Indicators
  • Content type: strategy
  • Markets: S&P 500, Stocks

Source video

Decoded from: Last Day Of The Month Trading Strategy - Ultimo Effect (Backtested) by Quantified Strategies — watch the original

Key timestamps:

  • 0:08 - Introduction to Turn of the Month strategy
  • 0:32 - Explanation of the End of the Month effect
  • 0:50 - Turn of the Month effect definition
  • 1:15 - Rules of the trading strategy
  • 1:20 - Entry rule for S&P 500
  • 1:25 - Exit rule for S&P 500
  • 1:55 - Annual return comparison
  • 2:10 - Drawdown comparison

Strategy overview

The Turn of the Month (TOM) effect — often called the "Ultimo Effect" after the term for a month's final trading day — is the long-observed tendency for equity returns to cluster around the close of one month and the open of the next rather than spread evenly across the calendar. This entry decodes Quantified Strategies' video "Last Day Of The Month Trading Strategy - Ultimo Effect (Backtested)", which narrows that broad seasonal observation into a single mechanical entry-and-exit rule applied to the S&P 500.

What sets this apart from most strategies in the automated-trading catalog is that there is nothing on the chart to compute. There is no oscillator to tune, no breakout level to measure, no pattern to recognize — the signal is simply a position on the calendar. The commonly cited rationale is structural cash flow: month-end fund rebalancing, pension and salary-linked contributions, and index-tracking activity that tends to concentrate buying pressure into a narrow window each month. That makes the Ultimo Effect a time-based anomaly rather than a price-based one, which is exactly why it appeals to traders looking for a rule that is trivial to automate and impossible to fudge.

A note on honesty: the video's title flags the idea as "Backtested," but that is a single-source claim, and no fixed rules, dates, or results were extracted for this page. Calendar anomalies are also the kind of edge most prone to fading once they are widely published, and month-end timing conventions vary between markets and data feeds. Treat the Ultimo Effect as a clean, testable hypothesis about *when* returns concentrate — not as a settled result — and verify it against your own S&P 500 history before acting on it.

Topics

turn of the month strategy · ultimo effect · seasonal trading · s&p 500 trading strategy · stocks trading strategy · swing trading strategy · pine script · trading strategy · tradingview strategy · technical indicators · market anomaly · monthly trading

Frequently asked questions

What is the Turn of the Month (Ultimo) effect?

It is the historical tendency for stock-index returns to cluster around the last trading day of a month and the first few days of the next, instead of being distributed evenly through the month. "Ultimo" refers to that final day of the month, which is why the pattern is sometimes called the Ultimo Effect.

Why would returns cluster at the turn of the month?

The usual explanation is structural cash flow rather than any chart signal: month-end fund rebalancing, pension and salary-linked contributions, and index-tracking flows tend to concentrate buying pressure into a short window. It is a proposed cause, not a proven mechanism, and it can weaken as market structure changes.

What market does this version target?

The decoded video from Quantified Strategies applies the turn-of-the-month rule specifically to the S&P 500, framing it as a single mechanical entry-and-exit around the month boundary rather than a discretionary read.

How can I check whether the turn-of-the-month effect still holds?

Because the signal is purely a date, it is straightforward to test: define the entry and exit days, then measure returns over that window across many years of S&P 500 history and compare them to the rest of the month. Strategy Decoder extracts the structure of concepts like this from video sources so you can evaluate and backtest them yourself before risking capital.

About this strategy page

This trading strategy was decoded by Strategy Decoder's AI from a public YouTube trading video and turned into a structured, reviewable specification. In the interactive app this page shows the full entry and exit logic, risk management settings, the indicators involved with their parameters, AlgoWizard-compatible logic and a Pine Script export ready for TradingView backtesting — plus an automated backtest verdict when one has been computed for this strategy.

Strategy Decoder catalogs 2,229 decoded strategies. Each one is extracted with confidence scoring, cross-linked to the indicators it uses, and kept up to date as new videos are processed daily. Load this page with JavaScript enabled to use the interactive tools, or start from the strategy explorer to filter by methodology, market and timeframe.

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