Earlier quoted context omitted.
A 1% tax would still be huge. Traders measure trading cost in basis points (100ths of 1%). Such a tax would affect not only high-frequency traders, but also all market makers and even long-term investors like pension funds and mutual funds. To operate an index fund, for instance, you have to buy and sell millions of shares everyday. A 1% tax would make impossible to operate an index fund cheaply. Cuban's proposal is…
I think he understands it just fine. Implement a tax that requires people to actually buy stock for reasons other than its price. Make it too expensive to trade millions of shares every second to make small fractions of a return. Make people buy shares because they want to see the company succeed, not to make a quick buck. Back to basics. I kind of like the idea.
Huh?
I buy stock to make money. I make money when I buy at a lower price than I sell said stock. Note that price plays a role in both transactions.
Serious question - who buys stock for reasons other than price expectations?