There’s a simple but incredibly powerful idea gaining traction in the financial world: women investing in women. We often talk about this through the lens of venture capital supporting female entrepreneurs – because, outrageously, only 4.9% of VC partners in the United States are women, and only 3% of VC funding goes to female founders. The more progress here, the better, but I think the idea of women investing in women is far bigger than the task of moving percentages in the VC arena. The truth is that women tend to re-invest a higher portion of their earnings back into…