GENEVA (Reuters) - Global direct foreign investment (FDI) dipped slightly around the world last year, hit by massive divestment in Hong Kong and a drop in flows into Britain due to Brexit uncertainty, the United Nations said on Monday.

FILE PHOTO: Euro, Hong Kong dollar, U.S. dollar, Japanese yen, pound and Chinese 100 yuan banknotes are seen in this picture illustration, January 21, 2016. REUTERS/Jason Lee/Illustration/File Photo

FDI could rise marginally in 2020 on the back of modest growth as trade tensions between China and the United States ease, but geopolitical uncertainties and protectionist pressures are tempering expectations, it said.

In 2019, global FDI flows were estimated at $1.39 trillion, down 1% from a revised $1.41 trillion in 2018, the U.N. trade and development agency UNCTAD said in a report.

FDI, which includes cross-border mergers and acquisitions (M&A), intra-company loans and investments, is a bellwether of globalization and a potential sign of future growth of corporate supply chains.

Investment flowing into the Chinese territory of Hong Kong, the Asian financial hub that has been wracked by political unrest, nearly halved last year to $55 billion, the report said.

“In Hong Kong there was $48 billion of divestment in terms of equity,” James Zhan, UNCTAD’s senior director of investment and enterprise, told Reuters. He noted that the former British colony was also affected by Sino-U.S. trade tensions.

Competition from Shanghai and Shenzhen in mainland China as well as Singapore for high-end FDI, such as regional business hub functions and R&D activities of multinationals, also weighs on Hong Kong, he said.

“Hong Kong’s economy is a solid economy. Longer term-wise, it is attractive for international investment,” Zhan said.

Britain, beset by uncertainty last year over the outcome of Brexit but now on course to leave the European Union on Jan. 31, saw inward FDI flows shrink by 6% to an estimated $61 billion last year, according to the report.

FDI flows to developed economies fell by 6% last year to an estimated $643 billion, and remained at a historically low-level, at half of their peak in 2007, it said.

FDI to the EU as a whole fell by 15% to $305 billion, as several countries experienced “strong volatility”, it said.

The EU and some member states have tightened their FDI entry screening, particularly over “national security concerns”, Zhan said, and this could deter some FDI especially in technology.

Flows to the United States, the largest FDI recipient worldwide, were stable at $251 billion. The report said the impact of a 2017 U.S. tax reform that reduced U.S. outward FDI flows appears to have ebbed.

FDI flows to developing economies remained stable at an estimated $694 billion, led by China with a flat $140 billion.