“The richest people on earth became $1 trillion richer in 2017, more than four times last year’s gain, as stock markets shrugged off economic, social and political divisions to reach record highs. The 23 percent increase on the Bloomberg Billionaires Index, a daily ranking of the world’s 500 richest people, compares with an almost 20 percent increase for both the MSCI World Index and Standard & Poor’s 500 Index.”