FTSE falls 2.4 percent, tracks global sell-off

* FTSE 100 down 2.4 pct, with no gainers on the index

* Banks, commodity shares the standout losers

LONDON, July 8 (Reuters) - Britain's leading share index fell 2.4 percent early on Tuesday, tracking steep losses in the United States and Asia on concerns that financial companies would have to raise more capital.

By 0736 GMT, the FTSE 100 .FTSE was down 131.8 points at 5,380.9 after gaining 1.9 percent on Monday. There was no gainer on the UK benchmark index, which has fallen 16.7 percent so far this year.

"Shorter term, the concerns are the same in terms of inflation, the economy, corporate earnings. It's difficult to indentify a positive catalyst," Richard Hunter, head of UK equities at Hargreaves Lansdown, said.

European shares were also down sharply in early session.

Banks were among the standout losers on the FTSE 100 following concerns that the top two U.S. mortgage providers would have to raise even more capital.

Barclays (BARC.L: Quote, Profile, Research), Royal Bank of Scotland (RBS.L: Quote, Profile, Research), HSBC (HSBA.L: Quote, Profile, Research), HBOS (HBOS.L: Quote, Profile, Research), Lloyds TSB (LLOY.L: Quote, Profile, Research), Alliance & Leicester (ALLL.L: Quote, Profile, Research) and Bradford & Bingley BB.L were down between 2.6 and 22.6 percent.