Here’s an interesting historical look into past instances that resemble the current market environment. Unfortunately, I can’t say that I put a lot of weight into such a small data set, but it’s interesting nonetheless:
“There are few times in history when the S&P 500 has been within 1% or less of its upper Bollinger band (two standard deviations above the 20-period moving average) on daily, weekly and monthly resolutions; coupled with a Shiller P/E in excess of 18 – the present multiple is actually 22.3; coupled with advisory bullishness above 47% and bearishness below 27% – the actual figures are 51% and 24.5% respectively; with the S&P 500 at a 4-year high and more than 8% above its 52-week moving average; and coupled, for good measure, with decelerating market internals, so that the advance-decline line at least deteriorated relative to its 13-week moving average compared with 6-months prior, or actually broke that average during the preceding month. This set of conditions is observationally equivalent to a variety of other extreme syndromes of overvalued, overbought, overbullish conditions that we’ve reported over time. Once that syndrome becomes extreme – as it has here – and you get any sort of meaningful “divergence” (rising interest rates, deteriorating internals, etc), the result is a virtual Who’s Who of awful times to invest.
Consider the chronicle of these instances in recent decades: August and December 1972, shortly before a bull market peak that would see the S&P 500 lose half of its value over the next two years; August 1987, just before the market lost a third of its value over the next 20 weeks; April and July 1998, which would see the market lose 20% within a few months; a minor instance in July 1999 which would see the market lose just over 10% over the next 12 weeks, and following a recovery, another instance in March 2000 that would be followed by a collapse of more than 50% into 2002; April and July 2007, which would be followed by a collapse of more than 50% in the S&P 500, and today.
The prior instances were sometimes followed by immediate market losses, and were sometimes characterized by extended top formations – which produce a sort of complacency as investors say “see, the market may be elevated and investors may be over-bullish, but the market is so resilient that it’s ignoring all that, so there’s no reason to worry.” Ultimately, however, the subsequent plunges wiped out far more return than investors achieved by remaining invested once conditions became so extreme. We are in familiar territory, but that territory generally marks the mouth of a vortex.”
Source: Hussman Funds