A key element of EDP's strategy is to maintain a strong financial profile while delivering growth targets under remuneration regimes that enhance the visibility of free cash flow generation over the medium term. EDP's financial deleveraging efforts follow hand-in-hand with a strict financial criteria underlying investment decisions, timely execution of projects and a risk-controlled growth strategy.
Our funding policy is structured to promote efficiency and costs savings. EDP’s financial debt is essentially raised at holding level and then on-lent to its subsidiaries. Our centralized financial management promotes efficiency and allows for costs savings. EDP raises funding through both international debt capital markets and bank loans. The funding that is raised at subsidiarity level is mostly project finance related, at EDP Renováveis level, and the result of our ring-fenced policy for EDP Brasil, which raises its funding needs locally.
We have a strong liquidity position backed by highly diversified sources which reinforces our low-risk profile. EDP keeps a strong liquidity position, favoring committed facilities at competitive cost over cash and maintaining at least 12 to 24 months of refinancing needs ahead. We diversify our sources of funding, tapping the most efficient markets and maintaining a wide range of strong banking counterparties, an active management of foreign exchange risk, maintaining a net investment hedge policy by raising funds in the same currency of our investments.
We target reinforcing our credit metrics in the period 2019-2022 as an additional lever to improve our financial risk profile.
In particular, we aim to reduce our Net debt/EBITDA ratio to <3.0x by 2022, backed by strong organic cash flow, capital reallocation towards an even lower-risk business risk profile. We believe these credit metrics are consistent with our target for a BBB rating in 2019-22 period.
Green funding is an important tool to finance the energy transition, which assumes a particular relevance for EDP given our growth plan is mostly based on renewables, as such EDP established a Green Bond Framework to align both our sustainability and financial strategies.