The account @News_crypto says on X that $750 billion was added to US stocks "today" after President Trump put attacks on Iran on hold. It is a one-line claim with a link and nothing else.
The post gives no date, no index, no market data and no source for the figure. It does not say who announced the hold, what it covers or whether it is temporary. Developing, unverified: the $750 billion figure, the pause itself, and the link between the two. Treat all three as claims until official statements or market data back them up.