Figure 2.2 compares the action between bonds and stocks in the three-year period prior to October 1987. Since 1982 bonds and stocks had been rallying together. Both markets had undergone a one-year consolidation throughout most of 1986. Early in 1987 stocks began another advance but for the first time in four years, the stock rally was not confirmed by a similar rally in bonds. What made matters worse was the bond market collapse in April 1987 (coinciding with the commodity price rally). At the very least stock traders who were following the course of events in commodities and bonds were warned that something important had changed and that it was time to start worrying about stocks.

What about the long lead time between bonds and stocks? It's true that the stock market peak in August 1987 came four months after the bond market collapse that took place in April. It's also true that there was a lot of money to be made in stocks during those four months (provided the trader exited the stock market on time). However, the action in bonds and commodities warned that it was time to be cautious.

FIGURE 2.2
BONDS USUALLY PEAK BEFORE STOCKS. BONDS PEAKED IN 1986 BUT DIDN'T START TO DROP UNTIL THE SPRING OF 1987. THE COLLAPSE IN BOND PRICES IN APRIL OF 1987 (WHICH COINCIDED WITH AN UPTURN IN COMMODITIES) WARNED THAT THE STOCK MARKET RALLY (WHICH PEAKED IN AUGUST) WAS ON SHAKY GROUND.

Many traditional stock market indicators gave "sell" signals in advance of the October collapse. Negative divergences were evident in many popular oscillators; several mechanical systems flashed "sell" signals; a Dow Theory sell signal was given the week prior to the October crash. The problem was that many technically oriented traders paid little attention to the bearish signals because many of those signals had often proven unreliable during the previous five years. The action in the commodity and bond markets might have suggested giving more credence to the bearish technical warnings in stocks this time around.

Although the rally in the CRB Index and the collapse in the bond market didn't provide a specific timing signal as to when to take long profits in stocks, there's no question that they provided plenty of time for the stock trader to implement a more defensive strategy. By using intermarket analysis to provide a background that suggested this stock rally was not on solid footing, the technical trader could have monitored various stock market technical indicators with the intention of exiting long positions or taking some appropriate defensive action to protect long profits on the first sign of breakdowns or divergences in those technical indicators.