SANTIAGO, Oct 28 (Reuters) - Chile's blue-chip stock index IPSA .IPSA slid 1.5 percent at its preliminary closing on Wednesday, dragged down by profit-taking and negative results on Wall Street, analysts said.

The IPSA index closed at 3,321.42 points and the all-market IGPA index .IGPA finished 1.34 percent lower at 15,668. 48 points. (Reporting by Aaron Nelsen; Editing by Dan Grebler)