source: https://www. a f r...

source: https://www. a f r .com/markets/equity-markets/stocks-trade-for-390-minutes-a-day-but-only-the-last-10-matter-20240430-p5fnil
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"The regular market for US equities runs for 390 minutes on a standard trading day. But at the rate things are going, eventually the last 10 might be the only ones that matter.

About a third of all S&P 500 stock trades are now executed in the final 10 minutes of the session, according to data compiled by BestEx Research, a developer of trading algorithms. That’s up from 27 per cent in 2021.

Now fresh evidence emerging from Europe — where the pattern is similar — suggests the trend may be hurting liquidity and distorting prices.

It’s new ammo for critics of the global boom in passive investing, because index funds drive the phenomenon. These products typically buy and sell shares at the close, since the last prices of the day are used to set the benchmarks they aim to replicate."