The Trump administration’s latest vow to inflict an “economic D-Day” on Iran seems fated, yet again, to come up short against the cold, hard reality of global finance.

The Trump administration calls this "economic D-Day" on Iran. Iran vows to respond to fresh sanctions in a "seismic manner."

Iran's rial slumps to record low ahead of sanctions announcement; Tehran charges measures prove US failed in war, says it issued warnings against cooperating with pressure campaign