
Clearly though, there is a relationship between these two yields. Rather
than looking at whether one yield is less than the other, look at the spread
between the yields. That spread is more a function of sentiment about the
future of the economy than anything else, and it does seem to have some
bearing on timing the market.
I plotted the earnings yield (trailing 12-month core earnings) of the S&P
500 back to 1982 and did the same for the 10-year T-note. Then I divided the
bond yield by the earnings yield and bought the stock market whenever
the ratio hit 1.5 standard deviations below its 10-day moving average. Given
that the yields are correlated, I am simply buying the market when bond
yields tank faster than earnings yields (or earnings yields go up faster than
bond yields), regardless of whether one is above the other. I am then sell-
ing the market when the ratio gets back to its 10-day moving average.
In summary, 14 trades were made and 10 were profitable (71 percent
success rate). The average gain per trade was 11 percent. The current open
trade is down 2.1 percent. To make this examination more thorough, I
would have to test back further than 1980, but it is a start. The overall point,
it seems, is that relative difference is of more interest than static difference
between the yields, contrary to what the Fed Model suggests. (See Table 9.1
and Table 9.2.)
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TRADE LIKE A HEDGE FUND
TABLE 9.1 Trades Executed (based on extreme shifts in Fed Model)
Entry Date Price Exit Date Exit Price % Change
2/1/1984 163.41 6/1/1984 150.55 –7.87
7/2/1984 153.16 3/1/1985 181.18 18.29
3/3/1986 226.92 6/2/1986 246.04 8.43
8/1/1986 236.12 10/1/1986 231.32 –2.03
12/1/1987 230.32 3/1/1989 288.86 25.42
7/3/1989 317.98 9/1/1989 351.45 10.53
10/1/1990 306.1 3/1/1991 367.07 19.92
TABLE 9.2 Trades Executed (based on extreme shifts in Fed Model)
Entry Date Price Exit Date Exit Price % Change
9/1/1992 414.03 3/1/1994 467.19 12.84
12/1/1994 453.55 2/1/1996 636.02 40.23
11/1/1996 705.27 1/2/1997 740.74 5.03
9/1/1998 957.28 1/4/1999 1,229.23 28.41
3/1/2000 1,366.42 5/1/2000 1,452.43 6.29
8/1/2000 1,430.83 6/1/2001 1,255.82 –12.23
8/1/2002 911.62 Open Open –2.1
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