A girl runs with her face painted at a square in La Guaira, Venezuela, Wednesday, February 15, 2023. Venezuelans prepare for upcoming carnivals. (Photo by Ariana Cubillos/AP Photo)

Luciana Benetti, 16, feeds her pet pig Chanchi, given to her for a birthday present the previous year in Buenos Aires, Argentina, Saturday, September 4, 2021. As the new coronavirus began to circulate last year, Benetti found her plans for a big traditional 15th birthday party scrapped. In its place, her parents gave her a pig. (Photo by Natacha Pisarenko/AP Photo)

Members of the Brooklynettes dance team perform during the second quarter between the Brooklyn Nets and the Golden State Warriors in New York on December 21, 2022. (Photo by Brad Penner/USA Today Sports)

An inmate covers his head as he passes the time inside Quezon City Jail in Manila, Philippines October 19, 2016. Nearly 2,300 drug users and dealers have been killed in police operations or by suspected vigilantes since Duterte took office on June 30, according to the Philippines police. (Photo by Damir Sagolj/Reuters)

Women perform square dancing at a park square in Beijing, China, April 9, 2015. Chinese-style square dancing is running circles around other hobbies for the elderly, with millions taking to parks and plazas across China, swivelling their hips and rolling their arms – but it's not to everyone's liking. (Photo by Kim Kyung-Hoon/Reuters)

A woman and her son hold firecrackers during Diwali, the Hindu festival of lights, in Mumbai, India, November 4, 2021. (Photo by Francis Mascarenhas/Reuters)

Model Amber Rose attends the Maxim Hot 100 Party at the Hollywood Palladium on July 30, 2016 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)

Some are in it just for the money, others to help buy a meal. Then there are those who trade for fun or to spend time among friends. Millions of investors – pensioners, security guards, high-school students – dominate China's stock markets, conducting about 80 percent of all trades. Retirees gather in brokerage houses dotted around China also to enjoy some company and savour the air conditioning on hot days. Some start as young as 13, trading from home with an eye on future careers in finance. Winning isn't guaranteed. This year, among the most turbulent in China's financial history, its stock markets more than doubled in the six months to May, only to crash amid concerns that growth in the country, which makes everything from cars to steel, is slowing faster than previously thought. (Photo by Aly Song/Reuters)