Dexcom falls to four-month low

** Shares of medical device maker DexCom DXCM.O fall 9.7% to over four-month low of $68.47

** Hunterbrook Capital said on Thursday that it is short on DXCM, citing "inaccurate readings" from co's G7 continuous glucose monitor; shares of DXCM closed down about 1% on Thursday

** Reuters could not independently verify the claims

** The short report adds to concerns "emphasizing G7 reliability allegations," TD Cowen analysts said in a note

** Still, we acknowledge that uncertainty around co's G7 device "will continue to weigh on the stock, likely until we see third-quarter results indicative of continued momentum"- William Blair analysts

** Including session moves, stock down 12.2% YTD