Earlier this year, Vanguard announced the passing of founder John Bogle, one of the best investors of our time and also one of the true innovators in the financial services industry.

Bogle founded Vanguard back in 1974, and one of the very first products they offered was revolutionary: a mutual fund that tracked the S&P 500. Before Vanguard, it was nearly impossible for an individual investor to monitor and invest in the 500 top companies that the Standard and Poor's index tracks and weights based on performance. Bogle's fund created a new way for investors of all sizes to tap into the wealth-building power of the markets that other firms have been emulating and refining ever since.

On today's show, we dig a little deeper into how indexing works in 2019, the differences between passive and active investing strategies, and the key things you need to know if you're thinking about adding an index to your portfolio.