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Re:Stock-trading app Robinhood was rejected by 75 investors by akvadrako on Sunday May 13, 2018 @05:28PM (#17061141)
IB is actually one of the cheapest, but are also in almost every global exchange and have a lot of let's say "features". Of all the retail investing platforms, I think they are the biggest and the top pick for rather serious investors. It's actually not very user-friendly.

What makes you think they are expensive? Trading US stocks is like $1 per trade and interest rates are benchmark + 1.5%.

Re:Stock-trading app Robinhood was rejected by 75 investors by vostok on Sunday May 13, 2018 @05:58PM (#17061254)
> Of all the retail investing platforms, I think they are the biggest and the top pick for rather serious investors.

I would agree with this, but I'm not sure that this is a meaningful universe for comparison.

It's also quite different from the original claim with which I disagreed.

> use a professional broker such as Interactive Brokers, which institutional clients use

I'm sure that there are some institutional customers who use IBKR, but it's probably not many and they're probably not very cost sensitive.

This is also why I added so many qualifiers to my disagreement. You can open an LLC and be an institutional customer in a certain sense, but it doesn't mean that you're cost sensitive and trying to cut your costs to the bare minimum.