Donald Trump’s astonishing proposal to take over Gaza at times appeared to be made off the cuff, but the president insists he is serious. We explain what that may mean for the ceasefire deal between Israel and Hamas, and whether the proposal may be just a Trumpian riff. 

Meanwhile, building a portfolio that looks diversified has become a cinch. But, as our markets columnist writes, building one that is actually diversified, in the sense that its components offset each other’s risk, has become much harder.