August Almanac: Weak Early and Late, Brief Strength Mid-Month
By: Christopher Mistal & Jeffrey A. Hirsch
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July 27, 2017
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Money flows from harvesting made August a great stock market month in the first half of the Twentieth Century. It was the best month from 1901 to 1951. In 1900, 37.5% of the population was farming. Now that less than 2% farm, August is amongst the worst months of the year. It is the worst DJIA and S&P 500 month from 1988-2016 with average declines of 1.3% and 1.0% respectively. August is also the worst month for NASDAQ (–0.3%), Russell 1000 (–0.9%) and Russell 2000 (–0.7%) over the same time period. In post-election years since 1953, Augusts’ rankings are little changed: #12 DJIA, #11 S&P 500, #11 NASDAQ (since 1973), #11 Russell 1000 and #10 Russell 2000 (since 1981).
 
[August Post-Election Year Stat Table]
 
Contributing to this poor performance since 1987; the shortest bear market in history (45 days) caused by turmoil in Russia, the Asian currency crisis and the Long-Term Capital Management hedge fund debacle ending August 31, 1998 with the DJIA shedding 6.4% that day. DJIA dropped a record 1344.22 points for the month, off 15.1%—which is the second worst monthly percentage DJIA loss since 1950. Saddam Hussein triggered a 10.0% slide in August 1990. The best DJIA gains occurred in 1982 (11.5%) and 1984 (9.8%) as bear markets ended. Sizeable losses in 2010, 2011, 2013 and 2015 of over 4% on DJIA have widened Augusts’ average decline. A strong August in 2014 of S&P 3.8% and NASDAQ 4.8% preceded corrections of 7.4% and 8.4% respectively from mid-September to mid-October.
 
The first nine trading days of the month have exhibited weakness while mid-month is strongest. Note the bullish cluster from August 15-17. The end of August tends to get whacked as traders evacuate Wall Street for the summer finale. The last five days have suffered in 13 of the last 21 years with the S&P 500 up only five times on the next to last day in the past 21 years. In the last 21 years, the last five days of August have averaged losses of: Dow Jones Industrials, –1.0%; S&P 500, –0.9%; NASDAQ, –0.6% and Russell 2000, –0.02%.
 
On Monday of expiration the Dow has been up 15 of the last 22 times with four up more than 1%, while on expiration Friday it has been down six of the last seven years (–3.1% in 2015). Expiration week as a whole is down slightly more than half the time since 1990, but some of the losses have been steep (-2.6% in 1990, -2.3% in 1992, -4.1% in 1997, -4.0% in 2011, 2.2% in 2013 and 5.8% in 2015). The week after expiration is mildly stronger up 16 of the last 27.
 
August Vital Stats (1950-2016)
  DJI SP500 NASDAQ Russell 1K Russell 2K
Rank   10   11   11   10   9
# Up   37   36   25   23   22
# Down   30   31   21   15   16
Average %   -0.2   -0.1   0.1   0.2   0.2
4-Year Presidential Election Cycle Performance by %
Post-Election   -1.8   -1.5   -1.5   -1.5   -0.7
Mid-Term   -0.7   -0.4   -1.8   -0.1   -1.9
Pre-Election   0.9   0.5   0.7   0.3   -0.0001
Election   0.7   0.9   2.7   2.0   3.3
Best & Worst August by %
Best 1982 11.5 1982 11.6 2000 11.7 1982 11.3 1984 11.5
Worst 1998 -15.1 1998 -14.6 1998 -19.9 1998 -15.1 1998 -19.5
August Weeks by %
Best 8/20/82 10.3 8/20/82 8.8 8/3/84 7.4 8/20/82 8.5 8/3/84 7.0
Worst 8/23/74 -6.1 8/5/11 -7.2 8/28/98 -8.8 8/5/11 -7.7 8/5/11 -10.3
August Days by %
Best 8/17/82 4.9 8/17/82 4.8 8/9/11 5.3 8/9/11 5.0 8/9/11 6.9
Worst 8/31/98 -6.4 8/31/98 -6.8 8/31/98 -8.6 8/8/11 -6.9 8/8/11 -8.9
First Trading Day of Expiration Week: 1990-2016
#Up-#Down   18-9   21-6   23-4   22-5   20-7
Streak   U3   U3   U7   U3   U4
Avg %   0.3   0.4   0.5   0.3   0.4
Options Expiration Day: 1990-2016
#Up-#Down   11-16   12-15   13-14   13-14   13-14
Streak   D4   D4   D2   D2   D4
Avg %   -0.3   -0.3   -0.3   -0.2   0.01
Options Expiration Week: 1990-2016
#Up-#Down   12-15   15-12   17-10   15-12   18-9
Streak   D2   D2   U1   D2   U1
Avg %   -0.5   -0.1   0.3   -0.1   0.4
Week After Options Expiration: 1990-2016
#Up-#Down   16-11   18-9   17-10   18-9   18-9
Streak   D1   D1   D1   D1   U4
Avg %   0.4   0.4   0.7   0.4   0.07
August 2017 Bullish Days: Data 1996-2016
  14, 17, 29 15-17, 22, 29 14-17, 22, 29 15-17, 22, 29 14, 16, 17, 22
          25, 29
August 2017 Bearish Days: Data 1996-2016
  1, 21, 30 11, 18, 21, 30 7, 8, 18, 21 21, 25, 30 2, 7, 8, 21