Fitbit shares fall sharply, while Garmin sheds gains after Apple launches Apple Watch Series 4.

New watch to have chip for faster performance, chip that allows watch to detect a person falling and then start an emergency call.

New watch can also detect irregular heartbeat, low heart rate and take electrocardiogram and is FDA cleared.

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Fitbit last down 3.7 pct and Garmin shares flat; Apple off 0.4 pct.

(Reporting by Savio D'Souza)