The Dow Jones 30 Industrials index closed at 52215.16 on Friday, October 23, marking a decline of 652.82 points, according to data released by the Associated Press. This drop was the most significant percentage loss among the major U.S. indices listed in the report.

The S&P500 index also finished lower, closing at 7623.68 after falling 39.75 points. The Nasdaq Composite showed a more modest decline, ending the session at 26008.859, down 53.517 points. In contrast, the SOX (Philadelphia) index rose 47.486 points to close at 10731.978.

Sector-specific indices within the Dow family also ended in negative territory. The Dow Jones 15 Utilities index closed at 1098.09, down 7.01 points. The Dow Jones 20 Transportation index fell more sharply, closing at 20041.91 after a drop of 252.52 points.

European markets displayed mixed results on the same day. The FT-100 (London) index closed at 10690.36, down 34.67 points. The SMI (Zurich) index declined by 85.61 points to finish at 14547.97. However, the MIB (Milan) index bucked the downward trend, closing at 48558.86 after an increase of 175.20 points.