NYSE Says Certain Trades to Be Canceled After Glitch at Open (3)

The New York Stock Exchange said some trades will be declared “null and void” after a glitch caused hundreds of securities to commence trading on Tuesday without an opening auction price.

The exchange said transactions in a swath of stocks will be reviewed as “clearly erroneous” under NYSE rules. That applies to trades in certain securities that did not conduct an opening auction, that occurred after the 9:30 a.m. bell but before certain thresholds were set that normally limit haywire swings, and that were executed too far from the reference price.

In an updated statement on its website several hours ...