Google now second-largest US firm, passing Exxon

Google has passed Exxon to become the second most valuable US company by market capitalisation.
The internet companyâs market capitalisation surpassed that of oil company Exxon Mobil last week, according to FactSet data.
As of Fridayâs market close, it sat at US $395.42bn compared with the oil companyâs $392.66bn.
Shares of Google have been on a steady climb since the beginning of 2013, gaining 66%.
Market capitalisation is the number of outstanding shares multiplied by their value.
Meanwhile, Exxonâs have risen just 5%. Since the beginning of this year, they have lost about 10% of their value.
Both companies trail Appleâs market capitalisation of $463.55bn.