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2012issue C0774-77

Weekly bear-market and shock signals as a mechanical procedure

A weekly Standard & Poor's 500 chart covering 1992 through 2011 displays a bear-market signal and a shock-event warning as under-price conditions. Editorial reading: sell, stand aside, and re-enter become educationally testable only as one rule set inspected after each Friday close.

  • A condition is a bundled set of factors that produces a buy, a sell, or a warning aligned with the price history above it.
  • The bear-market signal is a persistent under-chart sell-state for an expected serious decline. When that condition ends, recovery-mode is the mechanical re-entry window.
  • The shock-event warning is a weekly-percentage-drop of more than 4.5 percent, checked once per bar in a mechanical-weekly-review after Friday's close.
  • Short-lived 2011 sell states that reversed within one or two weeks are treated as acceptable stand-aside intervals, not rule failures, because re-entry remains available if the decline does not continue.
Entries in this reading3 entries
Current trackTrend following168 readingsRule-based entry292 readingsMechanical trading system322 readings

Two under-price conditions on one weekly chart

A weekly Standard & Poor's 500 chart covering 1992 through 2011 is used to display two under-price conditions: a bear-market signal and a shock-event warning.

The bear-market signal is a plotted sell-state on that weekly index chart. It marks when a serious decline regime is treated as active. The shock-event warning is a separate plotted alert for an abrupt negative weekly price shock. It is used as an early warning rather than a completed trend verdict.

S&P 500 weekly path, 1992–2012

Weekly S&P 500 from early 1992 through the 3 February 2012 print, taken from the StockFinder area chart. A trader should see the two long stand-aside declines after the late-2000 and early-2008 peaks, the March 2009 low, the April 2009 re-entry, and the brief 2011 exits that did not become a third crash. Index levels are visual readings against the printed scale; 666, 853 and 1312.89 are the figures the article and last-print box state.
Weekly S&P 500 from early 1992 through the 3 February 2012 print, taken from the StockFinder area chart. A trader should see the two long stand-aside declines after the late-2000 and early-2008 peaks, the March 2009 low, the April 2009 re-entry, and the brief 2011 exits that did not become a third crash. Index levels are visual readings against the printed scale; 666, 853 and 1312.89 are the figures the article and last-print box state.S&P 500 · Weekly · 1992-01-01T00:00:00.000Z to 2012-02-29T00:00:00.000Z

Source y-axis is marked non-linear, so unmarked levels are rounded to the nearest ten index points. The 50-week and 100-week averages and the red/yellow condition strips were not turned into extra series. Shock-event flags in the article are a 4.5 percent week-over-week drop, not a price level on this plot.

What a condition resolves to

A condition is a bundled set of rule inputs that resolves to one output: buy, sell, or warning. In this case study those outputs are aligned with the price history above the plotted state.

The bear-market signal and recovery-mode

The bear-market condition is presented as a persistent under-chart state. It marks an expected serious decline. When that condition ends, the end is treated as the start of a recovery-mode re-entry window.

Dated case-study sell states include December 2001, January 2008, 2 September 2011, and 7 October 2011.

Dated case-study end-of-bear states include May 2003 and April 2009. The April 2009 end arrived five weeks after a March 2009 low.

The shock-event warning

Shock-event detection is specified as a weekly close more than 4.5 percent below the prior week's close. That weekly-percentage-drop uses price percentage change without volume or other indicators.

One Friday-close review

The mechanical-weekly-review is scheduled after Friday's close so the weekly-percentage-drop rule can be checked once per bar. That fixed Friday-close inspection turns entry, exit, and abstention into one repeatable procedure.

Short-lived 2011 sell states that reversed within one or two weeks are treated as acceptable stand-aside intervals rather than rule failures, because re-entry remains available if the decline does not continue.

Editorial reading of the 2011 stand-aside intervals

Editorial reading: those short 2011 sell states keep sell, stand aside, and re-enter inside the same procedure. The archive presents them as part of the historical workflow, not as a later-market forecast.

Educational research material, not investment advice. Historical source context does not establish present-day performance.
26 of 38 in the Trend following track
20138-9 pp.Next on Trend followingA 2013 rates week as a structure-first exit drillClassify market-structure first, as volatile, trending, range-bound, moving strongly, or drifting with little momentum, before any technique is applied.
All readings on this track · 38 readings
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  2. 1987Operator gut check when two systems conflict
  3. 1988Visual trend rules need one testable procedure
  4. 1988Audit trend and breakout rules sold without tests
  5. 1992Weekly 4 percent close reversal case study
  6. 1992Write down the plan, then wait for the cross
  7. 1994Constructing a three-rule moving-average system
  8. 1995Weekly long-only trend rules with a gated retracement exit
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  10. 1997Three-line break as a one-parameter mechanical filter
  11. 2000Nested horizon trend alignment with a momentum stack
  12. 2001When certainty turns off the stop
  13. 2001Price must confirm every setup
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  15. 2002Evaluating mechanical trend signals from ten-session average excursions
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  19. 2007One checklist for entry, exit and abstention after a market switch
  20. 2008Parallel listings and divergent trend behavior
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  23. 2010Mechanical trend-following system design, stops, and validation
  24. 2010A trading-plan that sets entry, stop, trail, and pause together
  25. 2010Multi-horizon cycle signals, trend filters, and stops
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  30. 2015Relative-strength-index rules under a 20-percent trend filter
  31. 2015Trend-gated oscillator entry and exit rules
  32. 2016Trend process versus end-goal trading
  33. 2017Gold as a classroom for one midterm-trend procedure
  34. 2017Falling-knife FX longs wait for a four-hour trend turn
  35. 2018A closed procedure for quarterly sector rank slots
  36. 2018A recursive median as shared state for trend rules
  37. 2020Moving-average construction as an objective trend filter
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