US President-elect Donald Trump, flanked by tech investment group SoftBank CEO Masayoshi Son, announced today that the group will invest $100 billion in the US over the next four years, which according to Trump will boost the American economy.

Trump emphasized that the investment would create 100,000 jobs focused on the field of Artificial Intelligence (AI) and related infrastructure, with the money available before the end of Trump’s term.

The president-elect said the investment is evidence of “monumental confidence in America’s future” and called Sean “one of the most accomplished business leaders of our time.”

The pledge of the $100 billion investment, made at Trump’s news conference in Mar-a-Lago, Florida, comes with the president-elect’s pledge to stimulate the US economy and reduce the impact of inflation on Americans during the second his term, which begins on January 20.

Today’s announcement echoes a similar promise Sean made to then-President-elect Trump in December 2016 at Trump Tower, when Sean said he would invest $50 billion and create 50,000 jobs.

While this money was ultimately spent, it is unclear whether these jobs were created.

It is not clear how SoftBank plans to finance the new investment. As of Sept. 30, the group had about $29 billion in cash and cash equivalents, according to its most recent earnings report.

Trump is known for announcing investments that promise thousands of jobs, even though such investments don’t always pay off. Early in his first term he announced a $10 billion investment by FoxConn in a Wisconsin plant that promised thousands of jobs, an investment that was largely abandoned.