In the following video, Fool contributor Matt Thalman discusses a few questions every investor should ask after one of his or her holdings doubles, triples, or increases even more than that in value. Matt feels the five most important questions are: what will the tax implications on the holding be, what's your portfolio allocation, how risky is the holding, what's your investing time frame, and what was your initial investing thesis and is it still good?

Fool contributor Matt Thalman owns shares of Bank of America, MICHAEL KORS HOLDINGS LTD COM NPV, and Tesla Motors. The Motley Fool recommends Coca-Cola, Netflix, and Tesla Motors. The Motley Fool owns shares of Bank of America, Netflix, and Tesla Motors. Check back Monday thru Friday as Matt explains what caused the Dow's winners and losers of the day, and every Saturday for a weekly recap. Follow Matt on Twitter @mthalman5513. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.