Arch Capital Group Ltd. (ACGL) reported fourth-quarter 2023 operating income of $2.49 per share, which beat the Zacks Consensus Estimate by 28.4%. The bottom line increased 16.4% year over year. The results benefited from improved premiums and higher net investment income.Behind the HeadlineGross premiums written improved 12% year over year to $4.3 billion. Net premiums written climbed 7.4% year over year to $3.3 billion on higher premiums written across its Insurance and Reinsurance segments as hard market ...