US STOCKS SNAPSHOT-Wall St opens flat ahead of Fed's policy decision

Sept 17 (Reuters) - Wall Street's main indexes opened subdued on Wednesday ahead of a widely anticipated interest-rate cut from the Federal Reserve later in the day, while Nvidia slipped after a report Chinese tech firms might stop buying its chips.

The Dow Jones Industrial Average .DJI rose 20.5 points, or 0.04%, at the open to 45,778.4. The S&P 500 .SPX fell 1.9 points, or 0.03%, at the open to 6,604.87​, while the Nasdaq Composite .IXIC dropped 0.9 points, or flat, at 22,333.016 at the opening bell.