April 30 Premarket Briefing: 10 Things You Should Know

Updated from 6:45 a.m. EDT.

Here are 10 things you should know for Wednesday, April 30:

-- U.S. stock futures were pointing to a weaker start for Wall Street on Wednesday as investors awaited a rates announcement from the Federal Reserve following the central bank's two-day meeting.

European stocks were mixed. Asian shares finished Wednesday's session mixed as well. Japan's Nikkei 225 index rose 0.1% after the Bank of Japan avoided changes in its ultra-loose policy.

2. -- The economic calendar in the U.S. on Wednesday includes the ADP Employment Change Index for April at 8:15 a.m. EDT, the advance report on first-quarter GDP at 8:30 a.m., Chicago PMI at 9:45 a.m., and the rate decision from the Federal Open Market Committee at 2 p.m.

3. -- U.S. stocks on Tuesday closed higher amid a solid spate of earrings, even as economic reports suggested a muted beginning to the year.

The  Dow Jones Industrial Average closed 0.53% higher to 16,535.37 while the S&P 500 was up 0.48% to 1,878.33. The  Nasdaq was 0.72% higher to 4,103.54.

4. -- Twitter (TWTR) reported first-quarter results that were better than Wall Street's expectations, while the company topped 255 million monthly active users.

For the first quarter, Twitter posted adjusted break-even results on a per-share basis as revenue totaled $250.49 million. Advertising revenue surged 125% year over year to $226 million. Twitter said mobile advertising revenue was about 80% of total advertising revenue, while data licensing and other revenue totaled $24 million, an increase of 76% from a year earlier.

Though the company surpassed 255 million MAUs, up 25% year over year, that growth is slowing. In the fourth quarter of 2013, MAUs grew 30%.

The stock fell 12.6% in premarket trading to $37.25.

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