He's not hiding his business record. He's keeping the democrats noses out of his private income tax records. The Obama supporters lied and continue to lie about details of the SEC records he's filed and the only reason they want access to his tax records is to find something they can distort and lie about. Why? might you ask. Because Obama needs a diversion from his dismal record for the past 3.5 years.
In other words, Romney didn't make even a dime offa any of his investments, therefore he didn't hafta pay taxes even on that bundle Bain paid him for being absent.
And I'll bet you're trying to sell a bridge in Brooklyn.