“IFRS & the United States – Yes or no?”
Most of the world’s capital markets now require IFRS for the financial statements of publicly traded companies. The remaining major capital markets without an IFRS mandate are:

The United States, which has no plans to change
Japan, where voluntary adoption is permitted but not required
China, which intends to fully converge at some undefined date

The SEC issued a report on the implications of incorporating IFRS into the US system for financial reporting in 2012 and found little support for the adoption of IFRS as authoritative guidance in the US. Although mandatory use of IFRS for US companies is not required, the SEC representatives suggested FASB and IASB should work together to eliminate differences when in the best interest of capital markets in 2016. In 2017, the SEC Chair pointed out the SEC should support efforts by FASB and IASB to converge the accounting standards to enhance the quality and comparability of financial reporting. The SEC is also discussing the possibility of allowing domestic companies to voluntarily submit IFRS financial information (without reconciliation) in addition to their US GAAP financial statements.