Wall Street ended a lacklustre session little changed today after a speech by Federal Reserve Chairman Ben Bernanke failed to give investors any hints about US interest rate policy despite their concerns that the economy might be slowing too fast.

Stocks in the United States finished a quiet session little changed today as investors’ anticipation of the Federal Reserve’s decision on interest rates muted their reaction to lower oil prices and a trio of acquisitions.

In the most highly-anticipated Wall Street debut since the heady days of the dot-com boom, shares of Google surged nearly 20% on their first day of public trading as the quirky internet company completed its much-hyped initial stock offering.