Apple, Google and other Nasdaq Stocks Swing Wildly in After-Hours Trading – Normangee Star

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It wasn’t immediately clear if shares changed hands at those prices.

The likes of Amazon.com Inc. and Microsoft Corp.’s shares appeared to fall by more than 50 percent, while Apple Inc.’s stock was at one stage trading 348 percent higher, data from post-market trading on the Nasdaq Stock Market showed on Monday.

Some websites showed Amazon plunging 87%, Apple dropping 14% and Microsoft jumping 79% late Monday.

In a statement obtained by the Financial Times, Nasdaq said the culprit was “improper use of test data” that was picked up third party financial data providers.

The swings came on a day that the USA stock market closed early at 1 p.m., on the eve of the July 4 holiday. “Nasdaq is working with third party vendors to resolve the matter”, the spokesman said.

A flood of incorrect stock market data hit traders’ screens Tuesday (Jul 4) morning in Asia, with Nasdaq-listed securities including Apple (AAPL), Amazon (AMZN) and Microsoft (MSFT) all showing prices of US$123.47, according to Dow Jones. So were those of eBay – up 254% – and video game developer Zynga – up a staggering 3,292%. But they didn’t appear on Nasdaq’s own website. “UTP (Unlisted Trading Privileges) is asking all third parties to revert to Nasdaq Official Closing Prices effective at 5:16 PM”.