Your morning briefing, the business news you need in just 15 minutes.

On today's podcast:
(1) A senior Hamas leader was killed by Israel in an explosion in Beirut, according to the Palestinian militant group, raising fresh concerns of a regional escalation of the war in Gaza.

(2) Container shipping giant Maersk says it will once again stop letting its vessels sail through the Red Sea, a vital trade corridor, after another of its carriers came under attack in the space of a few weeks.

(3) Apple got itself a new bear as expectations of soft demand for its latest iPhone prompted analysts at Barclays to downgrade the stock. Shares fell 3.6% on Tuesday, their biggest one-day percentage drop since September, and the decline erased more than $107 billion in market value.

(4)  Tesla delivered more vehicles than expected in the fourth quarter, though not enough for the Elon Musk-led company to stay ahead of China's BYD Co. in global electric-car sales.

(5) Claudine Gay is stepping down as president of Harvard University, ending a brief and tumultuous tenure marred by allegations of plagiarism and a campus controversy over antisemitism.