Apple's secrecy around its Services revenue, up 12% YoY in Q3 but down from a 25% average in the four previous quarters, shows why investors need more insight (Martin Peers/Bloomberg)

Martin Peers / Bloomberg:
Apple's secrecy around its Services revenue, up 12% YoY in Q3 but down from a 25% average in the four previous quarters, shows why investors need more insight  —  Analyzing Apple's earnings can, on occasion, feel like looking at a jigsaw puzzle with some of the pieces missing.