In this video as part of our Ask a Fool series, Motley Fool One advisor Jason Moser takes a question from a Fool reader, who asks, "Why would a winning stock that has had a good run and now makes up a bigger portion of your portfolio, mean that there is a greater risk? Heard this argument on Market Foolery the other day. Doesn't make sense to me."
Ask a Fool: Why Do Well-Performing Stocks Increase Risk?
By Jason Moser – Sep 10, 2013 at 5:15PM
NASDAQ: AAPL
Apple
Market Cap
$3.9T
Today's Change
(0.20%) $0.53
Current Price
$262.77
Price as of October 21, 2025 at 4:00 PM ET
Why the one-star performer in your portfolio may be exposing you to outsized risk.
About the Author
Jason Moser is a Senior Investment Analyst and Lead Advisor at The Motley Fool and has been with the company since 2010. Jason covers payments, fintech, cloud communications, cloud computing, and tech stocks. He holds a B.A. in Economics from Wofford College.