The stock market was kind to Mark Zuckerberg this summer.
So was life in general.
Facebook shares jumped 14 percent in the past three months, as of Thursday's close, the best performance among the five most valuable U.S. technology companies. Apple and Microsoft each rose about 7 percent, While Amazon and Alphabet dropped.
As Labor Day weekend arrives and the kids return to school, Zuckerberg finds himself the world's fifth-richest person, just behind Warren Buffett and ahead of Carlos Slim. Facebook's summertime rally added over $8 billion to the founder's fortune, which now sits at $71.7 billion, according to the Forbes billionaires list.
At 33, Zuckerberg is 54 years younger than Buffett, who amassed his fortune through many decades of value-based investing. Zuckerberg earned his wealth by creating an online business that's grown rapidly around the globe and now has 2 billion users.