Cross-posted from Goldstocksforex.com:
What caused the Black Monday crash of 1987? Analysts are often unable to identify a single trigger or cause.
Sniper points to a sharp run-up in short-term interest rates in the 3 months prior to the crash.
Valuations were also at extreme readings, with PEmax (price-earnings based on the highest earnings to-date) near 20, close to its Black Friday high from the crash of 1929.
Often overlooked is the fact that the S&P 500 was testing resistance at its previous highs between 700 and 750 from the 1960s and 70s (chart from macrotrends).
A combination of these three factors may have been sufficient to tip the market into a dramatic reversal.
Are we facing a similar threat today?
Short-term rates are rising but at 40 basis points over the last 4 months, compared to 170 bp in 1987, there is not much cause for concern.
PEmax, however, is now at a precipitous 26.8, second only to the Dotcom bubble of 1999/2000 and way above its October 1987 reading.
While the index is in blue sky territory, with no resistance in sight, there is an important psychological barrier ahead at 3000.
Conclusion: This does not look like a repetition of 1987. But investors who ignore the extreme valuation warning may be surprised at how fast the market can reverse (as in 1987) from such extremes.