If the prevent buy and let people only sell stock it is going to create a great market imbalance that will just crash the stocks blocked. For once this done by

If the prevent buy and let people only sell stock it is going to create a great market imbalance that will just crash the stocks blocked. For once this done by multiple broker is pure market manipulation because it is going to have a huge effect on the blocked stocks... and will leave big fish with direct access dictate the direction.