'Flash crash' saw Apple shares gain 40,000 per cent

Shares of the iPad maker Apple soared 40,000 per cent and traded at $100,000 apiece during the "flash crash" of 6 May, it was revealed yesterday. More details have emerged of the chaotic 20-minute trading period, when the US stock market fell 9 per cent before just as suddenly rebounding, including the fact that aberrant trades were by no means all in one direction.

The details point to a system-wide withdrawal of liquidity as the main contributor to the event, among numerous other factors. And they put the focus on the practice of electronic market-makers putting in "stub quotes" at extreme prices, not ever expecting them to be traded on.

Mary Schapiro, the chairman of the Securities and Exchange Commission, told a Congressional hearing yesterday that stub quotes are used by professional liquidity providers, who are given special trading privileges in return for agreeing to always provide buy and sell quotes for shares. Apple was one of five stocks in which trades were executed at the artificially high price; many others traded at the extremely low price of one cent.

The Dow Jones plunged 998 points that afternoon, as concerns about Greece spiralled into a wider sell-off in derivatives designed to track the market. Earlier declines triggered a wave of orders to sell at any price, and liquidity appeared to dry up in many stocks.

Start your day with The Independent, sign up for daily news emails
Arts and Entertainment
The Doctor and Clara have their first real heart to heart since he regenerated in 'Deep Breath'
TV
Life and Style
Apple showed no sign of losing its talent for product launches with the new, slightly larger iPhone 6 making headlines
techSecurity breaches and overhyped start-ups dominated a year in which very little changed (save the size of your phone)
News
The official police photograph of Dustin Diamond taken after he was arrested in Wisconsin
peopleDownfall of the TV star charged with bar stabbing
Arts and Entertainment
Jeremy Clarkson, left, and Richard Hammond upset the locals in South America
tvReview: Top Gear team flee Patagonia as Christmas special reaches its climax in the style of Butch and Sundance
PROMOTED VIDEO
ebooks
ebooksA year of political gossip, levity and intrigue from the sharpest pen in Westminster
News
Ernesto Che Guevara and Fidel Castro, right, met at Havana Golf Club in 1962 to mock the game
newsFidel Castro ridiculed the game – but now investment in leisure resort projects is welcome
News
Hackers revealed Oscar-winning actress Lawrence was paid less than her male co-stars in American Hustle
people
Arts and Entertainment
Clueless? Locked-door mysteries are the ultimate manifestation of the cerebral detective story
booksAs a new collection of the genre’s best is published, its editor explains the rules of engagement
Sport
Robin van Persie is blocked by Hugo Lloris
footballTottenham vs Manchester United match report
Life and Style
A general view during the 2014 Victoria's Secret Fashion Show at Earl's Court exhibition centre on 2 December, 2014 in London, England
fashionIt's not all about the catwalks: the big changes of the past year can be summed up in six clothing items
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs Money & Business

Selby Jennings: VP/SVP Credit Quant- NY- Investment Bank

Not specified: Selby Jennings: VP/SVP Credit Quant Top tier investment bank i...

Selby Jennings: Quantitative Research | Equity | New York

Not specified: Selby Jennings: Quantitative Research | Global Equity | New Yor...

Selby Jennings: SVP Model Validation

Not specified: Selby Jennings: SVP Model Validation This top tiered investment...

Selby Jennings: Oil Operations

Highly Competitive: Selby Jennings: Our client, a leading European Oil trading...

Day In a Page

A timely reminder of the bloody anniversary we all forgot

A timely reminder of the bloody anniversary we all forgot

Who remembers that this week we enter the 150th anniversary year of the end of the American Civil War, asks Robert Fisk
Homeless Veterans appeal: Former soldiers pay their respects to a friend who also served

Homeless Veterans appeal

Former soldiers pay their respects to a friend who also served
Downfall of Dustin 'Screech' Diamond, the 'Saved By The Bell' star charged with bar stabbing

Scarred by the bell

The downfall of the TV star charged with bar stabbing
Why 2014 was a year of technological let-downs

Why 2014 was a year of technological let-downs

Security breaches and overhyped start-ups dominated a year in which very little changed (save the size of your phone)
Cuba's golf revolution: But will the revolutionary nation take 'bourgeois' game to its heart?

Will revolutionary Cuba take 'bourgeois' golf to its heart?

Fidel Castro ridiculed the game – but now investment in leisure resort projects is welcome
The Locked Room Mysteries: As a new collection of the genre’s best is published, its editor Otto Penzler explains the rules of engagement

The Locked Room Mysteries

As a new collection of the genre’s best is published, its editor explains the rules of engagement
Amy Adams on playing painter Margaret Keane in Tim Burton's Big Eyes

How I made myself Keane

Amy Adams hadn’t wanted to take the role of artist Margaret Keane, because she’d had enough of playing victims. But then she had a daughter, and saw the painter in a new light
Ed Richards: Parting view of Ofcom chief. . . we hate jokes on the disabled

Parting view of Ofcom chief... we hate jokes on the disabled

Bad language once got TV viewers irate, inciting calls to broadcasting switchboards. But now there is a worse offender, says retiring head of the media watchdog, Ed Richards
A look back at fashion in 2014: Wear in review

Wear in review

A look back at fashion in 2014
Ian Herbert: My 10 hopes for sport in 2015. Might just one of them happen?

Ian Herbert: My 10 hopes for sport in 2015

Might just one of them happen?
War with Isis: The West needs more than a White Knight

The West needs more than a White Knight

Despite billions spent on weapons, the US has not been able to counter Isis's gruesome tactics, says Patrick Cockburn
Return to Helmand: Private Davey Graham recalls the day he was shot by the Taliban

'The day I was shot by the Taliban'

Private Davey Graham was shot five times during an ambush in 2007 - it was the first, controversial photograph to show the dangers our soldiers faced in Helmand province
Revealed: the best and worst airlines for delays

Revealed: the best and worst airlines for delays

Many flyers are failing to claim compensation to which they are entitled, a new survey has found
The stories that defined 2014: From the Scottish independence referendum to the Ice Bucket Challenge, our writers voice their opinions

The stories that defined 2014

From the Scottish independence referendum to the Ice Bucket Challenge, our writers voice their opinions
Stoke-on-Trent becomes first British city to be classified as 'disaster resilient' by the United Nations

Disaster looming? Now you know where to head...

Which British city has become the first to be awarded special 'resilience' status by the UN?