By Chris Dieterich and Jacob Bunge 
 

NEW YORK--Wall Street's main trade group on Monday threw its support behind plans by NYSE Euronext (NYX) to reinstate the exchange operator's internal safeguards against volatile stock moves in the wake of recent violent swings seen around the opening and closing bells.

The Securities Industry and Financial Markets, or Sifma, said in a letter to regulators that allowing the NYSE to reintroduce its system could mitigate early- and late-session stocks swings until new systemwide rules take full effect later this summer.

The Big Board operator last week asked regulators for permission to revive its system of so-called stock speed bumps, known as liquidity replenishment points, or LRPs. These were phased out by the exchange when a new, market-wide system was introduced in April.

The new system to contain violent stock moves only allows trades to take place within price bands tied to a share's recent trading history. The new rules are being rolled out in phases and won't take effect during the first 15 and final 30 minutes of trading until early August.

A series of sudden stock prompted worries about the vulnerability of the markets for the next two months around the opening and closing bells. Last month, NYSE cancelled hundreds of trades in Anadarko Petroleum Corp. (APC) after its stock plummeted from more than $90 to one penny in the final second of trading. Other trades in American Electric Power Co. Inc. (AEP) and NextEra Energy Inc. (NEE) were let stand after drops of more than 50% shortly after the market opened.

On Monday, NYSE cancelled trades in Williams-Sonoma Inc. (WSM) after a steep decline shortly after the opening bell.

"Recently, there have been several occurrences of sharp price declines in stocks during the open and close periods when the price bands are not in effect," said T. R. Lazo, Sifma's managing director and associate general counsel in the letter.

"[Sifma] believes that allowing NYSE to reinstate the LRP functionality will help reduce the instances of sharp price movements until Phase II of the plan, when the price bands will be in effect during the entire trading day."

NYSE dropped its proprietary safeguards ahead of the implementation of the new rules to help reduce the complexities associated with overlapping systems.

"Any concerns about market complexity would be outweighed by the fact that reinstating the LRP functionality could reduce the likelihood of sharp price movements during the open and close periods," Mr. Lazo said in the letter.

The NYSE proposal would see it return its proprietary safeguards when the new market-wide system is inactive. The new system will begin expanding to cover the entire trading day by Aug. 5, at which point the NYSE would again phase out its program as stocks gain full-day protections, according to its proposal.

The exchange said industrywide volatility guards shouldn't "come at the expense of existing investor-protection mechanisms" and warned of "unintended consequences to the detriment of investors and the marketplace as a whole," in an April letter to the SEC outlining its plans to phase out the system.

Write to Chris Dieterich at christopher.dieterich@dowjones.com and Jacob Bunge at jacob.bunge@dowjones.com

Subscribe to WSJ: http://online.wsj.com?mod=djnwires

Grafico Azioni NYSE Group (NYSE:NYX)
Storico
Da Giu 2024 a Lug 2024 Clicca qui per i Grafici di NYSE Group
Grafico Azioni NYSE Group (NYSE:NYX)
Storico
Da Lug 2023 a Lug 2024 Clicca qui per i Grafici di NYSE Group