Professor Menachem Brenner co-invented the volatility index in 1986, now known as the Chicago Board Options Exchange's volatility index, or better known as the VIX. /CGTN Photo The world's population is growing older, with the age group of 65 and over growing the fastest, according to the most recent study by the United Nations. By 2050, 16 percent or one in six people of the whole world population will be over the age of 65, up from nine percent in 2019. While this global