The major Swiss bank UBS reported Tuesday that its fourth-quarter net loss attributable to shareholders was $279 million, compared to last year’s profit of $1.65 billion. Loss per share was $0.09, compared to profit of $0.50 in the prior year. Loss before tax was $751 million, compared to profit of $1.94 billion a year ago. Underlying profit before tax was $592 million, compared to $914 million a year earlier. For the quarter, total revenues climbed 35 percent to $10.86 billion from $8.03 billion last year. Looking ahead to the first quarter, the company projects substantial sequential improve…