Everyone knows it's hard to stay invested when markets are falling. Fewer people realize it can be just as hard when markets are rising. The temptation simply wears a different disguise. Take some profits, lock in the gains, get out before the pullback everyone's so sure is coming. And with the market near all-time highs, that temptation is everywhere right now. In today's email: Why a rising market quietly tests your discipline What 17 years of "reasons to sell" should teach us The one move...