????共享式租車服務公司ZipCar上市后一周股價漲幅已超過60%。對于一家在2009年至2010年虧損額擴大近兩倍的公司而言，這樣的漲幅相當可觀。

????事實是企業不一定要盈利，才能上市。

????今年以來，已有19家獲風險資本支持的企業在美國的證交所完成IPO定價，其中12家是未盈利企業，包括日前發行額達9,200萬美元的Sagent Pharmaceuticals。

????但總的來說，盈利企業在IPO及上市后股價表現方面都優于未盈利企業。平均而言，盈利企業單筆IPO募資規模1.08億美元，截至發稿前一日收盤，二級市場股價較發行價上漲25.23%。而未盈利企業(不包括日前首日上市交易的Sagent)的單筆IPO募資規模8,800萬美元，股價上市以來漲幅僅略高于9%。若考慮到Sagent，最后一個數據可能會略有上升，但升幅不會太大——截至發稿，Sagent股價上漲約19%。

????而且，股價漲幅最大的是中國殺毒軟件生產商奇虎360科技；該公司去年實現凈利潤近850萬美元，營業收入5,700萬美元。股價較IPO價格14.50美元/股已上漲近135%。

????下面列出了全部19家企業的IPO價格、最近股價及IPO募資規模 (標紅的是非盈利企業)：

????In the week since car-sharing service ZipCar (ZIP) went public, its stock has climbed more than 60%. Not too shabby for a company whose losses nearly tripled between 2009 and 2010.

????The reality is that companies do not need profits to go public.

????So far this year, 19 VC-backed companies have priced IPOs on U.S. exchanges. Twelve of them were unprofitable, including yesterday's $92 million offering from Sagent Pharmaceuticals (SGNT).

????In general, however, profitable issuers have more successful IPOs and after-market performance. On average, they raised $108 million and were trading 25.23% higher than their offering prices as of yesterday's market close. The unprofitable issuers (minus Sagent, which began trading today) raised around $88 million, and were up just over 9%. That last figure will rise a bit once Sagent is taken into account -- it's up around 19% as of this writing -- but not by too much.

????Moreover, the largest percentage gainer is Qihoo 360 Technology (QIHU), a Chinese maker of anti-virus software, which reported nearly $8.5 million in net profit last year on $57 million in revenue. Its shares are up nearly 135% from its $14.50 per share IPO price.

????Here's the full list (unprofitable companies in red):