No they don't. Hacking real accounts by real people is rare. Sarah Palin's Yahoo account got hacked by a real person - but she used easily Googled info on her as security questions. My guess is that most traders use Yahoo Finance as their primary source of market info - stock quotes, charts and option chains. They spend more time on Yahoo Finance than they do logged into their brokers accounts. So it makes sense to link the two together - for convenience.
Yeah I meant corporate databases. There's a dozen examples of that. Huh? I never have. A reliable broker has all that and more. Maybe some people use Yahoo when they get off work to check a stock in their 401K.... but any active trader is gonna use their broker's stuff. And if that's lacking, they'll change brokers. I mean IB charges for level 2... but the $4.99 brokers all give that away for free. Option chains w/L2 too. This makes zero sense to me.
> I'm sure there's a reason It's a way for Yahoo to monetize its investment in Finance. Presumably the brokers will kick back a few pennies for every order sent via Yahoo's pipes.
Imagine linking your brokerage account to a third party vendor...even Yahoo http://money.cnn.com/2017/10/03/technology/business/yahoo-breach-3-billion-accounts/index.html
their charting tool sucks. didn't they have a security breach recently? someone from Alabama logged into my yahoo email for a year or so. I told them about it and they couldn't do a thing about it. at one time, Microsoft wanted to pay $30 billion dollars for it
Yahoo is currently in the process of having all their account holders sign a new approval for changed Terms and Conditions: Looking at the details it looks like they want more from you than Facebook and Google together.