NEW YORK, Sept 13 — US stock indexes fell sharply today, snapping a four-day winning streak, after data showed monthly US consumer prices unexpectedly rose in August, cementing bets of a third straight 75-basis-point rate hike from the Federal Reserve next week.

All of the 11 S&P sectors declined in early trading, led by a 3.3 per cent slump in the communication services sector. The small cap Russell 2000 index dropped 2.5 per cent.

The S&P 500 growth stocks index, which houses rate-sensitive technology and growth stocks, fell 3 per cent as Treasury yields rose, while its value counterpart lost 1.6 per cent.

Mega-cap technology stocks Apple Inc and Microsoft Corp fell more than 2.3 per cent each, while Tesla Inc, Alphabet Inc, Amazon.com Inc and Meta Platforms Inc dropped between 2.7 per cent and 5.6 per cent to weigh the most on the S&P 500 and the Nasdaq.

The Labour Department’s consumer price index (CPI) report showed monthly CPI gained 0.1 per cent in August from July, against expectation of a 0.1 per cent dip. On a year-on-year basis it increased by 8.3 per cent, while economists were anticipating a rise of 8.1 per cent, according to a Reuters poll.

Excluding the volatile food and energy components, core CPI increased to 6.3 per cent from 5.9 per cent in July, putting further pressure on the Fed to continue on its rate-hike spree.

"The longer term view is pretty clear here, that monetary policy is a very blunt instrument and anybody that thought inflation would start to roll over just because the Fed hiked a couple times is pretty ignorant to the way economics works,” said Doug Fincher, portfolio manager at Ionic Capital Management.

Policymakers last week emphasized their determination to keep raising rates until there is a sustained drop in inflation, which has been running at 40-year highs and above the Fed’s target of 2 per cent.

Money markets now see an 81 per cent chance of a 75-basis-point increase in rates and 19 per cent chance of a whopping 100 bps hike by the Fed at its September 20-21 meeting, while expecting rates to peak around 4.28 per cent in March 2023.

The dollar, which has risen sharply this year in part due to expectations of aggressive rate hikes by the Fed, erased early morning losses to climb 1 per cent.

The gap between yields on the two- and 10-year notes, often seen as an indicator of a looming recession, inverted further. Rate-sensitive bank stocks dropped 2 per cent.

At 9.46am ET, the Dow Jones Industrial Average was down 606.02 points, or 1.87 per cent, at 31,775.32, the S&P 500 was down 94.40 points, or 2.30 per cent, at 4,016.01, and the Nasdaq Composite was down 376.36 points, or 3.07 per cent, at 11,890.06.

The three major indexes had rallied recently as investors took advantage of a sharp drop in stock prices since mid-August that was triggered by concerns over soaring inflation and the impact of tighter monetary policy to curb it.

Eastman Chemical slid 5 per cent after the company forecast a downbeat third-quarter profit, citing demand slowdown in consumer durables market, higher costs and a hit from a stronger dollar.

The CBOE volatility index, also known as Wall Street’s fear gauge, rose to 24.97 points.

Declining issues outnumbered advancers for a 11.92-to-1 ratio on the NYSE and a 6.29-to-1 ratio on the Nasdaq.

The S&P index recorded no new 52-week high and no new low, while the Nasdaq recorded 9 new highs and 62 new lows. — Reuters