Leading shares are mixed at the outset leaving the FTSE 100 barely changed, down 0.32% or 19 points to 6,004, although tech firm ARM received a boost.
Facebook will disclose extensive financial information or go public by early 2012 following a $2bn private fund-raising which values the social networking site at $50bn, according to reports.
Skandia has handed the management of its $125m (£83m) Technology fund from Wellington Management Company to Janus Capital Group.
Polar Capital's Ben Rogoff has put the 3% cash position in his Technology trust back into the stock market as valuations become compelling after the recent correction.
PSigma's James Abate says the US market has hit its trough and will not slump further this year, but is likely to see a "huge rally" in the reporting season.