What Does 3D Systems Have Against Profits?

3D Systems has a problem -- like many tech companies, it touts earnings that aren't really earnings.

3D Systems Corp. is one of those bubbly 3-D printer stocks that have come to epitomize today's frothy market valuations. Its shares fell 15 percent yesterday after it said fourth-quarter earnings would fall short of earlier forecasts. I can't help but wonder if the drop heralds a broader shift in the market's willingness to stomach meager profits at hot companies.

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