Bank of America, JC Flowers & Co, the financial investor, and China Investment Co, the Chinese sovereign wealth fund, are considering a possible joint bid for Lehman Brothers, the embattled Wall Street bank. According to people familiar with the matter, the BofA-led group is among those examining a rescue of Lehman, which is racing to find a buyer after shareholders, creditors and counterparties gave a thumbs-down to its efforts to survive as an independent entity. Barclays, the UK bank, is also interested.