GIF of the day: Skynet is in your stock exchanges, taking your money

High frequency trading has experienced a boom in the last five years. What next?

Reuters' finance blogger Felix Salmon presents the above animated gif, which shows the quantity of high frequency trades happening throughout the day in 14 American stock exchanges, charted between 2007 and 2012.

Watch to the end, to see the enormous spike in activity in 2011, particularly following the US downgrade in August that year, then read Felix's analysis:

Back in 2007, I wasn’t a fan of a financial-transactions tax; today, I am. And this chart shows better than anything why my opinion has changed. The stock market is clearly more dangerous than it was in 2007, with much greater tail risk; meanwhile, in return for facing that danger, society as a whole has received precious little utility.

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Election 2017: The 50 Labour MPs most at risk of losing their seats

Dozens of Labour MPs are at risk of losing their seats on June 8. Here are the 50 sitting MPs most at risk. 

Labour MPs representing marginal seats are at risk of losing their seats should their party's low polling numbers translate into electoral reality. Here's a full list of the 50 sitting MPs with the smallest majorities. 

Chris Matheson – City of Chester
Majority: 93 (0.2 per cent of total turnout)
Second place in 2015: Conservatives

Rupa Huq – Ealing Central & Acton
Majority: 274 (0.5 per cent)
Second place in 2015: Conservatives

Albert Owen – Ynys Mon
Majority: 229 (0.6 per cent)
Second place in 2015: Plaid Cymru

Ruth Cadbury – Brentford & Isleworth
Majority: 465 (0.9 per cent)
Second place in 2015: Conservatives

Margaret Greenwood – Wirral West
Majority: 417 (0.9 per cent)
Second place in 2015: Conservatives

Holly Lynch – Halifax
Majority: 428 (1 per cent)
Second place in 2015: Conservatives

Daniel Zeichner – Cambridge
Majority: 599 (1.1 per cent)
Second place in 2015: Liberal Democrats

Wes Streeting – Ilford North
Majority: 589 (1.2 per cent)
Second place in 2015: Conservatives

Paul Farrelly – Newcastle-under-Lyme
Majority: 650 (1.5 per cent)
Second place in 2015: Conservatives

John Woodcock – Barrow & Furness
Majority: 795 (1.8 per cent)
Second place in 2015: Conservatives

Tulip Siddiq – Hampstead & Kilburn
Majority: 1138 (2.1 per cent)
Second place in 2015: Conservatives

Joan Ryan – Enfield North
Majority: 1086 (2.3 per cent)
Second place in 2015: Conservatives

Peter Kyle – Hove
Majority: 1236 (2.4 per cent)
Second place in 2015: Conservatives

Paula Sheriff – Dewsbury
Majority: 1451 (2.3 per cent)
Second place in 2015: Conservatives

Cat Smith – Lancaster & Fleetwood
Majority: 1265 (3.1 per cent)
Second place in 2015: Conservatives

Natascha Engel - North East Derbyshire
Majority: 1883 (3.9 per cent)
Second place in 2015: Conservatives

Gareth Thomas – Harrow West
Majority: 2208 (4.8 per cent)
Second place in 2015: Conservatives

Madeleine Moon – Bridgend
Majority: 1927 (4.9 per cent)
Second place in 2015: Conservatives

Karen Buck – Westminster North
Majority: 1977 (5 per cent)
Second place in 2015: Conservatives

Iain Murray – Edinburgh South
Majority: 2637 (5.3 per cent)
Second place in 2015: SNP

Rosena Allin-Khan – Tooting
Majority: 2842 (5.3 per cent)
Second place in 2015: Conservatives

Ian Lucas – Wrexham
Majority: 1831 (5.6 per cent)
Second place in 2015: Conservatives

Richard Burden – Birmingham Northfield
Majority: 2509 (5.9 per cent)
Second place in 2015: Conservatives

Mary Creagh – Wakefield
Majority: 2613 (6.1 per cent)
Second place in 2015: Conservatives
 

Vernon Coaker – Gedling
Majority: 2986 (6.2 per cent)
Second place in 2015: Conservatives

Clive Efford – Eltham
Majority: 2693 (6.2 per cent)
Second place in 2015: Conservatives

Rob Flello - Stoke-on-Trent South
Majority: 2539 (6.5 per cent)
Second place in 2015: Conservatives

Susan Jones – Clwyd South
Majority: 2402 (6.8 per cent)
Second place in 2015: Conservatives

Jim Cunningham – Coventry South
Majority: 3188 (7.3 per cent)
Second place in 2015: Conservatives

Jenny Chapman – Darlington
Majority: 3024 (7.6 per cent)
Second place in 2015: Conservatives

David Hanson – Delyn
Majority: 2930 (7.7 per cent)
Second place in 2015: Conservatives

Gordon Marsden – Blackpool South
Majority: 2585 (8 per cent)
Second place in 2015: Conservatives

Julie Cooper – Burnley
Majority: 3244 (8.1 per cent)
Second place in 2015: Liberal Democrats

Mark Tami – Alyn & Deeside
Majority: 3343 (8.1 per cent)
Second place in 2015: Conservatives

Nic Dakin – Scunthorpe
Majority: 3134 (8.5 per cent)
Second place in 2015: Conservatives

Kerry McCarthy – Bristol East
Majority: 3980 (8.6 per cent)
Second place in 2015: Conservatives

Paul Flynn – Newport West
Majority: 3510 (8.7 per cent)
Second place in 2015: Conservatives

Alan Whitehead - Southampton Test
Majority: 3810 (8.8 per cent)
Second place in 2015: Conservatives

Neil Coyle – Bermondsey & Old Southwark
Majority: 4489 (8.8 per cent)
Second place in 2015: Liberal Democrats

Lindsay Hoyle (Deputy speaker) – Chorley
Majority: 4530 (8.8 per cent)
Second place in 2015: Conservatives

Helen Goodman – Bishop Auckland
Majority: 3508 (8.9 per cent)
Second place in 2015: Conservatives

Thangam Debbonaire – Bristol West
Majority: 5673 (8.9 per cent)
Second place in 2015: Green

Geoffrey Robinson – Coventry North West
Majority: 4509 (10 per cent)
Second place in 2015: Conservative

Graham Jones – Hyndburn
Majority: 4400 (10.2 per cent)
Second place in 2015: Conservatives

David Crausby – Bolton North East
Majority: 4377 (10.2 per cent)
Second place in 2015: Conservatives

Ivan Lewis - Bury South
Majority: 3508 (8.9 per cent)
Second place in 2015: Conservatives

Liz McInnes – Heywood & Middleton
Majority: 5299 (10.9 per cent)
Second place in 2015: Ukip

Alison McGovern – Wirral South
Majority: 4599 (11 per cent)
Second place in 2015: Conservatives

Alan Meale – Mansfield
Majority: 5135 (11.3 per cent)
Second place in 2015: Conservatives

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