Had the celebrity busi­ness­man and Re­pub­lic­an pres­id­en­tial can­did­ate in­ves­ted his even­tu­al share of his fath­er’s real-es­tate com­pany in­to a mu­tu­al fund of S&P 500 stocks in 1974, it would be worth nearly $3 bil­lion today, thanks to the mar­ket’s per­form­ance over the past four dec­ades.

If he’d in­ves­ted the $200 mil­lion that For­bes magazine determ­ined he was worth in 1982 in­to that in­dex fund, it would have grown to more than $8 bil­lion today.