'capital flow barriers' is correct and usable in written English.
For example, "The government imposed capital flow barriers to reduce investments from foreign countries."
How can the barriers to capital flow be removed?
The IMF cut its medium-term growth forecast for the UK from 2.1%to1.9%9% as a result of what it assumes will be barriers to trade, migration and capital flow.
Should capital flow to China?
At the same time, capital flow shut off.
"Let capital flow where it may" is bad policy.
While dealing with capital flow, one may need to consider current and capital account reversal.
Should capital flow freely around the world?
Above: World Capital Flow 2005, from Armed Madhouse by Greg Palast.
Targeted capital flow measures could also play a useful role.
That's a stunner, so I'll say it again: Minor reductions in the barriers to labor mobility would add more value than the total, global elimination of all remaining policy barriers to goods trade and all barriers to capital flows, combined.
