https://www.reuters.com/article/us-apple-power-chip-dialog-outlook/dialog-shares-tumble-on-warning-apple-could-build-its-own-chips-idUSKBN1DY0Q3 >Dialog Semiconductor said on Monday top customer Apple could build its own power-management chips into future iPhones rather than rely on the Anglo-German chipmaker, sending its shares plunging as much as 19 percent.