SoftBank posted its biggest gain in nearly three years at the flagship tech investment arm, the Vision Fund, in the December quarter amid a recovery in valuation of technology companies. Here’s how SoftBank did in the December quarter against LSEG estimates: Net sales: 1.77 trillion Japanese yen ($11.9 billion) versus 1.8 trillion Japanese yen expected. Net income: 950 billion Japanese yen versus 196.5 billion yen expected. The Vision Fund logged a gain on investment of 600.7 billion Japanese...