The Latest on the European Central Bank's monetary policy meeting (all times local):

11:10 a.m.

Investors appear to be a little apprehensive ahead of the European Central Bank's policy decision, with stocks down slightly.

The central bank is widely expected to cut a key interest rate further below zero and to step up its program to inject money into the economy, in the hope of raising inflation and economic activity.

The last time markets were expecting a new stimulus injection by the ECB, in December, the central bank underwhelmed, leading to a sharp drop in stocks. The euro surged as the stimulus was not as big as anticipated.

In mid-morning trading, the Stoxx 600 index of European shares was down 0.1 percent, while the euro was 0.3 percent lower at $1.0970.