The delimitation of financial speculations must be being overhauled to be more subtle, sophisticated, and effective across the world. If it still isn't actually occurring, then it should do, I guess.

Tobin tax provides valuable trains of thought for that issue. Quote:

Keynes writes: 

Speculators may do no harm as bubbles on a steady stream of enterprise. But the situation is serious when enterprise becomes the bubble on a whirlpool of speculation. (,[8] p. 104) 

The introduction of a substantial government transfer tax on all transactions might prove the most serviceable reform available, with a view to mitigating the predominance of speculation over enterprise in the United States. (,[8] p. 105) 

http://en.wikipedia.org/wiki/Tobin_tax#Tobin.27s_concept