The NASDAQ stock exchange just posted a record week for initial public offerings, with companies including Zillow and Skullcandy roughly half a billion dollars in three days.

Next week, the stock market will see seven separate IPOs.Taking the weeks of July 18 and July 25 together, the NASDAQ expects these IPOs will raise a cumulative $1.43 billion.

And let’s not even get started about the upcoming Groupon IPO or the expected but not yet confirmed Facebook IPO, which could value the social network as high as $100 billion.

So are we in a bubble yet?

“We’re happy to have a great week this week, but I obviously don’t look at any one week with any degree of importance,” NASDAQ CEO Bob Greifeld told VentureBeat.

Full story: Despite record IPO week, NASDAQ CEO doesn’t see a bubble | VentureBeat.