Morgan Stanley's profit slumped 30% today, falling short of analysts' estimates for the first time in nine quarters, as its investment banking business struggled to cope with a slump in global dealmaking.

Revenue from investment banking plunged 55% in the second quarter, mirroring a similar drop at its larger Wall Street rival JPMorgan Chase & Co and eclipsing an 8% rise in trading revenue.

The US Federal Reserve's aggressive actions to contain runaway inflation has rattled global financial markets, forcing corporates to curb their appetite for deals, while also slowing their efforts to raise cash through stock and debt offerings.

The turmoil has, in turn, upended a lucrative revenue stream for investment banks, whose results are also facing tough year-earlier comparisons when accommodative monetary policies led to record levels of deals.

Banks could see further pain down the road, as the latest report showed inflation had accelerated again in June, likely adding more pressure on the Fed to raise its benchmark rate.

"Larger transactional M&A will really be dependent on just price discovery and how markets open up over the course of the next six months," Morgan Stanley Chief Financial Officer Sharon Yeshaya said in an interview.

The bank's wealth management business, which is seen as a durable source of revenue, did little in the quarter to offset the slump in dealmaking.

Revenue from the business dipped 6% and contributed to a 11% slide in Morgan Stanley's net revenue.

Its equity and fixed income underwriting revenue also plunged 86% and 49%, respectively.

The bank reported a profit of $2.4 billion, or $1.39 per share, for the quarter ended June 30, compared with $3.4 billion, or $1.85 per share, a year earlier.

Analysts on average had expected a profit of $1.53 per share, according to data from Refinitiv.

The bank also said it had recorded a $200m expense related to a regulatory matter tied to the use of unapproved personal devices and record-keeping requirements.