U.S. markets closed higher on Wednesday, October 21, with technology in front. The Nasdaq Composite rose 1.05 per cent to 26,702.86, the Dow Jones Industrial Average gained 0.69 per cent to 52,856.09 — a one-month high — and the S&P 500 added 0.58 per cent to 7,757.17, within 0.8 per cent of its record high, according to closing summaries.

Semiconductors did the heavy lifting: the Philadelphia Semiconductor Index rose 1.97 per cent and the technology sector gained 1.67 per cent, while communication services fell 1.11 per cent and consumer staples and real estate also slid. Advancers beat decliners only 1.37-to-1 on the NYSE, a reminder the rally was narrower than the headline indexes suggest.

On the insider side, a current SEC Form 4 reading flags clusters — two or more distinct insider buyers — at a small set of names, including Uber, where two buyers account for about $13.3 million in net insider buying with a latest filing on October 16, and Pfizer, with three buyers and about $2.9 million, latest filing October 15. GameStop shows the largest cluster figure in the index, with five buyers, though its latest filing dates to October 13.

MarketBeat's October 21 screeners separately list growth names including Teledyne Technologies, Prologis and Ascendis Pharma among the highest dollar-volume growth stocks to watch. OTMedia reports disclosed filings, screener output and closing prices as market news only; none of it is a recommendation or advice to buy or sell any security.