month it was worth over a trillion dollars now it's dropped to eight hundred eighty billion one reason for the decline weaker than expected demand for the latest i phone models. not just for apple but for the entire benchmark s. and p. index here's why. well when a company represents close to five percent of the s. and p. five hundred itself then you do have companies that are behemoths that can move the market much more so than any company that's running to fifty or below but shares in other tech titans like facebook amazon netflix and alphabets are also down suggesting there may be more to the slump than simple i phone for team. top of the list of concerns among global investors the unpredictable consequences of the ongoing trade battle between the united states and china. reason enough of course