Softbank’s great adventure seems to be coming to an end, as the Japanese operator and investment fund reported its worst ever loss, and seemed poised to sell stakes in telcos at home and in the US. While it may reduce its holding in T-Mobile USA, or even exit the market, one of its assets is not in doubt – processor IP giant ARM, which has defied the recent crisis in Softbank’s portfolio and could even provide a saving grace in the form of an IPO. Softbank’s main businesses reported $13 billion in total annual losses and it lost another $18 billion on its investments. The company has now pledged to sell $41 billion in assets to boost liquidity and fund…