Steel dynamics set to join s&p 500; super micro computer to join s&p midcap 400

New york , dec. 19, 2022 /prnewswire/ -- s&p midcap 400 constituent steel dynamics inc. (nasd:stld) will replace abiomed inc. (nasd:abmd) in the s&p 500 and super micro computer inc. (nasd:smci) will replace steel dynamics in the s&p midcap 400 effective prior to the opening of trading on thursday, december 22. s&p 500 constituent johnson & johnson (nyse: jnj) is acquiring abiomed in a deal expected to close soon pending final conditions.
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