US stocks slipped on Wednesday, as investors brace for the upcoming US inflation report, which could give a clue on the direction of the Fed's monetary policy.

The S&P 500 showed a slight decline, having recorded huge losses on large banks. Fortunately, metropolitan and biotech stocks grew, so the drop was not massive.

The movement was narrow because some investors believe that inflation will be short-lived, while some expect that it will last long and force the Fed to tighten its monetary policy.

But the recent statements of the Fed indicate that it will be dovish for a long time, which Esty Dwek, head of global market strategy in Natixis Investment Managers, also claims. "Even if inflation turns out slightly higher than expected, the Fed will not change its course," Dwek said.

Key events this week are:

- Apple's annual developers conference (June 11);

- monetary policy meeting of the European Central Bank (Thursday);

- negotiations on the 2015 nuclear deal (Thursday);

- report on US CPI (Thursday);

- G7 summit (Friday).

Seven of the eleven major companies included in the S&P 500 index showed declines, while companies in the financial and healthcare sectors reported massive gains.