4.3.22Net Cash and Cash Equivalent

The cash and cash equivalents dedicated to debt and interest payments (restricted) amounted to US$ 188 million as per December 31, 2018 (2017: US$ 204 million). Short-term investment deposits are made for varying periods of up to one year, usually less than three months, depending on the immediate cash requirements of the Company and earn interest at the respective short-term deposit rates.

The cash and cash equivalents held in countries with restrictions on currency outflow (Angola, Brazil, Equatorial Guinea, Ghana and Nigeria) amounts to US$ 50 million (2017: US$ 58 million).

Further disclosure about the fair value measurement is included in note 4.3.29 Financial Instruments − Fair Values and Risk Management.