* TSX ends down 2.37 percent at 7,629.17
* Decline wipes out all of Wednesday gains
* U.S. bank concerns and weaker oil blamed for selloff (Adds comments, details, official numbers)
By Frank Pingue
TORONTO, March 5 (Reuters) - Toronto’s main stock index closed lower on Thursday, relinquishing all the gains made during the previous session, as nagging concerns about the global economic outlook shook the resource-heavy index.
Financial issues headlined the Toronto Stock Exchange’s latest decline with investors uneasy about the status of major U.S. banks. Energy shares also contributed to the selloff as oil prices tumbled on concerns about demand.
News that China opted not to announce an increase to its economic stimulus plan got the Toronto index off to a lower start as hopes for new stimulus measures by Beijing had supported euity rallies in the previous session.
Thursday’s selloff was the latest display of how little confidence investors have in stocks, considering the index has been unable to string together any sustainable gains after falling earlier this week to its lowest level in over five years.
“We had a bounce yesterday in tandem with global markets and so we’ve basically unwound that rally,” said Fergal Smith, managing market strategist at Action Economics.
“Yesterday, the market took some insurance against the possible addition of a China stimulus plan, so when that didn’t materialize overnight equity markets globally turned lower and so Canada tracked Wall Street lower.”
News from General Motors (GM.N), warning of possible bankruptcy, and nagging concerns about the fate of the U.S. banking system were also key issues that sent investors out of riskier assets like stocks.
The S&P/TSX composite index .GSPTSE closed down 185.58 points, or 2.37 percent, at 7,629.17, on the heels of a 183 point, or 2.4 percent, rally on Wednesday.
Nine of the TSX’s 10 main sectors ended lower. The financials index fell 4.97 percent, the steepest drop among all groups, while energy stocks ended down 3.09 percent.
The only gainer on the day was the materials sector, up 3.22 percent on strength in gold mining issues. (Reporting by Frank Pingue; editing by Rob Wilson)