GoDaddy was just added to the S&P 500. Once per quarter, the S&P 500 index undergoes a rebalancing. Essentially, this is a list of requirements companies must meet to be eligible and maintain their status as a member of the S&P 500. The quarterly rebalances ensure that new companies enter the index while replacing businesses that have fallen out of eligibility. One company that was just added to the S&P 500 is website and e-commerce specialist GoDaddy (GDDY -0.38%). Admittedly, I always viewed GoDaddy as so ...