This story appears in the May 4, 2014 issue of Forbes. Subscribe
Each issue, Forbes tracks the billionaires who made and lost the most money since we last published. Here are the winners and losers from March 19 to April 8.
WINNERS
+$1.6 billion
Net worth: $38.5 billion
Her Wal-Mart shares climb and a side investment in
+120 million
Net worth: $2.4 billion
A parting gift: He promised to resign as Lululemon's chairman after tumult in 2013; shares rebound on strong sales two months before his departure.
+$110 million
Net worth: $1.2 billion
Stock in his pharmaceutical company,
LOSERS
-$4.2 billion
Net worth: $25.9 billion
Facebook plunges as investors question big purchases. Jan Koum's shares are down 15% since February acquisition of his company, WhatsApp.
-$360 million
Net worth: $1.2 billion
WWE's stock slides after FORBES quotes an analyst skeptical about the company's new streaming network, which has only 667,000 subscribers.
Micky Arison
-$150 million
Net worth: $6.2 billion
Carnival announces a quarterly loss as it discounts cruise prices and increases ad spending in the wake of high-profile mishaps.