Should be selective for your advertisements
When I saw Yahoo Finance top page, an add "SUGAR ING IS GONE" was revealed. I am interested in this businessman, who are a Tycoon in Malaysia.
Unfortunately, I was lead to a seemingly fraud page, http://ccnnmedia.com/sugarking/?sxid=8xtcoucsq2xo&adid=%24%7BTRAFFICKEDADID%7D&clicktrack=%24%7BCLICKURL%7D&creative=%24%7BLIBRARYADID%7D&device=%24%7BSCREEN_TYPE%7D&domain=%24%7BDOMAIN%7D&lineid=%245b72bc55ba2e540a101dbbcb&orderid=%24%7BORDERID%7D&pageurl=%24%7BPAGE_URL%7D&publisherid=%245b64b9ceba2e540cfc8fe14b&subdomain=%24%7BSUB_DOMAIN%7D%2F
This looks like CNN site, but actually NOT.
This is unknown cnnmedia site, and the description is soliciting to a cryptocurrency scheme, Bitcoin Revolution.
According to the site below, this 'Revolution' is scam.
http://www.binaryoptionsarmy.com/2017/12/bitcoin-revolution-scam-review/
I highly appreciate Yahoo! Finance for a long time, but this advertisement is not suitable for your highly established financial site which have long respectable history, in my opinion.
Please consider to weed out these undesirable advertisements.
Thank you very much for your kind considerations.

Thanks for your post, Shun!
The ads you see on Yahoo help keep our services free of charge. Your ad feedback is important to us, as it helps us identify bad ads and adjust those we show in the future. Please review this help article: https://help.yahoo.com/kb/finance-for-web/sln25244.html.
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Yahoo Finance Support