The Blueprint for an International Treaty on a Multilateral and Multi-jurisdictional Tax on Financial Transactions has two basic aims:

1. To introduce an innovative financing mechanism for global development . The mechanism
is an internationally coordinated tax in the financial sector for a common or coordinated Development policy.

2. to contribute to global financial stability, to increase policy autonomy of States and to enhance the proper functioning of real economy by discouraging financial speculation.

We find download the report (english, pdf), here:

How can we implement today a Multilateral and Multi-jurisdictional Tax on Financial Transactions?