Sylla says. While the S&P 500 is down since 1999, it is up since mid-2001, meaning that most stock purchased since then by retirement accounts shows a gain.

塞拉表示，虽然标准普尔指数从1999年开始整体呈现下行走势，但它从2001年年中起出现了反弹，这就意味着退休储蓄帐户从那之后买进的大多股票还是有所斩获的。

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In the years since then, Sylla says, Wall Street has taken steps to prevent another Black Monday.

NPR: Black Monday: A Bad Day Led to Many Changes

"This is a globalization story, " said Richard Sylla, a professor at the Stern School of Business at New York University.

WSJ: Planned Deal Marks NYSE's Decline

Sylla skipped away from Nerijus Devetinas and crossed for the Swede to fire home off the crossbar from close range.

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