Best website to follow ETf fluctuations?

Well, I would like to learn more about ETf beyond the "buy S&P 500 and hold", before I begin investing (I can't do anything in any case until next year, when some bonds I have will expire) can you suggest a good website where I can follow real life market fluctuations and maybe learn something? Is there a ETf University somewhere online? thank you submitted by /u/ThePlayfulPanda [link] [comments]