(名詞) 影響全面的重要金融機構：對經濟至關重要，若倒閉可能造成金融危機的金融機構。這個頭字語為 systemically important financial institution 的縮寫。
Q: Is AIG part of the new regulation that came with the new Dodd-Frank legislation and the SIFI (systemically important financial institutions), or too-big-to-fail rules?
A: We don't know yet because that's one of the concerns the market has right now. We're not sure where we're going to come out on the federal landscape for SIFI regulations. So we don't know if we're going to be regulated as a SIFI.
—Maria Bartiromo, "AIG chief sees a 'core of strength' in U.S. economy," USA Today, August 14, 2011
The FSB list of 29 banks, known as "SIFIs," includes those judged to be the most globally important to the financial system by their size and complexity. The measures were agreed on by regulators to prevent any "systemically important financial institution" from failing and roiling the global economy.
—"Global regulators to subject 29 banks to stricter regulations," The Washington Post, November 4, 2011