Wall Street today, Aug. 21 -- Dow, Nasdaq, S&P drop as investors exercise caution ahead of the US Fed's Jackson Hole meeting.

At 9:30 a.m. (EDT), The Dow Jones Industrial Average fell 0.29% to 44,808.21 points. The S&P 500 dropped 0.23% to open at 6,380.83​ points, while the Nasdaq Composite declined 0.28% to 21,112.523 points at the opening bell.

(This is a developing story. Please check back for updates.)

Published by HT Digital Content Services with permission from MINT....