Strong day in the markets today.  All three of the major indices made new all time highs today.  As I have been writing for the past two years, the secular bull market has a long way to run yet.  I believe that this bull market i sonly in the early stages of the second leg.  The first leg started in 2008/09.  The second leg in 2016.  Yet, the bullish sentiment, currently, is abnormally low (and that is bullish).  Most investors and fund managers (according to the Wall Street Journal last week) are sitting on a mountain of cash.  But, every day, I hear traders trying to short anything that is up.  Why go against the trend?  The trend is your friend.  There is a lot more money to be made going long in a bull market than trying to short it.  If a stock dies correct, generally, it won't be as much of a move than when the major trend is down.  There are always individual stocks that are weak and can be shorted but, for example, lots of traders were shorting the front side of the move on AEZS.  The stock was up $1.75 on the long side and only corrected $.50 to the down side.  There was far less risk on good set ups on the long side than trying to short the front side of the move.  But each trader has their own style and reasons for trading.  Mine style is to go long in bull markets and short in bear markets,  I never fight the trend.  

BTW(which is short for by the way), investors are witnessing the biggest bull market on record and the end is nowhere near in sight.....