Stocks jumped on Friday as Apple ended a session above $3 trillion in market value for the first time and data showed inflation cooling in the United States and Europe.
Friday's buoyant round of trading in New York concluded a winning quarter for US stocks amid greater hopes the US economy can avoid a recession and that the Federal Reserve will soon end its interest rate hikes.
The S&P 500 piled on nearly 16 percent in the first six months of 2023.
European markets, meanwhile, finished the first half of the year with similar gains, with Paris up 14 percent and Frankfurt adding 16 percent since January 1.
Apple shares rose 2.3 percent, bringing the tech titan's market value back above $3 trillion. Apple had briefly breached the level in January 2022 during a trading session, but had closed below the benchmark.
The US inflation measure most closely watched by the Federal Reserve -- the personal consumption expenditures -- declined in May to 3.8 percent year-on-year from 4.3 percent in April, official data showed.
In Europe, figures showed that eurozone consumer prices rose 5.5 percent in June, down from 6.1 percent in May.
The Fed and the ECB have warned that more interest rate hikes are likely at their next meetings, but the latest inflation figures raised hopes that the central banks could soon wind down their monetary tightening.
"European stocks are ending the week on a high, buoyed by another encouraging inflation report that will soon support the end of the ECB's tightening cycle," said Craig Erlam, senior market analyst at the OANDA trading group.
The Fed kept its rate unchanged earlier this month after 10 straight increases, but chairman Jerome Powell warned this week that two more increases were probably necessary by the end of the year.
US Treasury bond yields eased following the latest inflation data.
"The inference, we suppose, is that this data point might not persuade the Fed from raising rates in July, but the disinflation trend could put a clamp on the willingness to raise rates again in September," said Briefing.com analyst Patrick O'Hare.
Strong US economic data this week, including an upgrade of first-quarter growth to 2.0 percent, gave room for the Fed to maintain its hawkish stance for now.
ECB President Christine Lagarde has pledged another rate increase at the Frankfurt-based central bank's next meeting in July.
- China worries -
In Hong Kong and Shanghai, traders trod with caution Friday after fresh data on China's economy showed further slowing, with factory activity contracting for the third straight month while growth in the services and construction industries slowed.
A string of similar data in recent months has fanned speculation that authorities will unveil measures to kickstart the economy.
But aside from some small interest rate cuts, officials have unveiled very little of substance to reassure investors, which has kept equities subdued.
China's cabinet on Friday said it would "take effective measures to enhance the momentum of development, optimize the economic structure, and promote the sustained recovery of the economy... in a timely manner".
- Key figures around 2030 GMT -
New York - Dow: UP 0.8 percent at 34,407.60 (close)
New York - S&P 500: UP 1.2 percent at 4,450.38 (close)
New York - Nasdaq: UP 1.5 percent at 13,787.92 (close)
London - FTSE 100: UP 0.8 percent at 7,531.53 (close)
Frankfurt - DAX: UP 1.3 percent at 16,147.90 (close)
Paris - CAC 40: UP 1.2 percent at 7,400.06 (close)
EURO STOXX 50: UP 1.0 percent at 4,399.09 (close)
Tokyo - Nikkei 225: DOWN 0.1 percent at 33,189.04 (close)
Hong Kong - Hang Seng Index: DOWN 0.1 percent at 18,916.43 (close)
Shanghai - Composite: UP 0.6 percent at 3,202.06 (close)
Euro/dollar: UP at $1.0912 from $1.0865 on Thursday
Pound/dollar: UP at $1.2696 from $1.2613
Euro/pound: DOWN at 85.92 pence from 86.14 pence
Dollar/yen: DOWN at 144.33 yen from 144.76 yen
West Texas Intermediate: UP 1.1 percent at $70.64 per barrel
Brent North Sea crude: UP 0.8 at $74.90 per barrel