Tesco
Tesco posted annual losses of £6.4bn on WednesdayReuters

Tesco, the UK's biggest supermarket, dragged the FTSE 100 stock index down on 22 April, after the retailer reported one of the biggest losses in corporate history.

The supermarket reported £6.4bn (€8.9bn, $9.6bn) pre-tax losses, a huge amount that caused the supermarket's shares to fall 5.2% over the day's trading.

Tesco's stock price is still well up in 2015 but it remains 35% lower than it was at the start of 2014. The Footsie slipped 0.5% overall, closing on 7,028.24 points.

Among the big risers was Rolls Royce Holdings, which gained 4.1%, while AB Foods bounced back from a poor day on 21 April, rising 1.2% a day later.

FTSE 100 biggest risers

Rolls Royce Holdings Plc +41.00 (+4.07%) 1,048.00
Travis Perkins +55.00 (+2.72%) 2,074.00
Rio Tinto plc +51.50 (+1.83%) 2,863.50
Hikma Pharmaceuticals +38.00 (+1.81%) 2,135.00
BHP Billiton plc +20.00 (+1.37%) 1,483.00

FTSE 100 biggest fallers

Tesco plc -12.10 (-5.15%) 222.65
Morrison (Wm) Supermarkets -8.10 (-4.08%) 190.40
Sainsbury (J) plc -10.20 (-3.73%) 263.00
Sports Direct Intl Plc -22.00 (-3.37%) 631.00
Hargreaves Lansdown plc -36.00 (-2.92%) 1,198.00