Tesco has reported a worse than expected full-year loss of £6.4bn, after £7bn in one-off charges arising from a "very difficult" 2014 dragged it into the red.
Another group of shareholders in Tesco is preparing legal action against the food retailer following its accounting blunder late last year.
Warren Buffett sold out of two of his energy stocks - including his position in the world's largest energy company ExxonMobil - as the oil price collapse accelerated at the end of last year.
The FTSE 100 is within sight of its all-time high after closing at its highest level for 15 years on Tuesday.
Dixons Carphone co-deputy chair John Allan is to replace Richard Broadbent as Tesco chairman, the supermarket has said.
Old Mutual Global Investors has reviewed its governance and voting policies in a bid to end UK executive pay-offs that it says are "a reward for failure".
Six weeks on from its annus horribilis, Tesco continues to split opinion among UK stockpickers.
Embattled supermarket Tesco has suffered a further blow in the form of an investigation by the industry regulator into its treatment of suppliers.
Dividends from UK firms last year grew at the slowest rate since 2010 as the strong pound continued to weight on payouts.
Invesco Perpetual Income manager Mark Barnett has been buying BP on recent price weakness but said it may be "too late" to build a stake in Tesco.