The
when-to-sell decision has always been more difficult than the when-to-buy
decision because the decision to buy only needs two conditions. We need to have
the free cash and we need to have a compelling story. The when-to-sell decision
has always been a historical nightmare for both professional and private
investors because there are too many moving parts to consider. We have the
micro or bottom up worries such as the compelling storey that has suddenly gone
sour. Perhaps some chart pattern has negative implications. We also have the
emotional baggage that compels us to sell a winner too soon and to hold on to a
loser too long.
We
also have the macro or top down worries such as the current crisis be it the
never ending Euro-Zone problems or the threat of a slowing Chinese economy. Now
we have the mindless chirping of the seasonal “sell” crowd pressuring investors
into switching a good portion of their equity portfolios to cash.
The
root of the problem is the failure to have an exit strategy in place at the
time of the decision to buy. The exit strategy or stop loss option should never
be based on changing fundamentals, otherwise known as the “compelling story”
because the price decline will often lead the deteriorating business model. I
am sure long tem investors in the shares of Nortel Networks Corporation or
Research In Motion Limited would agree with this observation
The
Lowest 26-Week Low is a simple strategy with no math required. Set your stop at
the lowest low of the past twenty six weeks. This is a moving 26-week window,
so each week add the new week and drop the oldest week. Sell if the weekly
price closes below the prior lowest 26-week low. Conversely, if the price is
rising the lowest 26-week low will follow the stock upward which allows us to
hold a rising stock in some cases for weeks, months or years.
Our
chart this week is that of the weekly closes of Research In Motion plotted
above the lowest 26-week low price channel. Note the numerous price declines
below the 26-week price channel trough 2010 and 2011. No excuses for big losses
here.