The most anticipated IPO so far this year, CBOE Holdings Inc., is expected this week, but worries about its high price compared to other exchanges may weigh on its shares in the current lackluster environment.

The Chicago Board Options Exchange is the country's largest options exchange and the last major U.S. exchange to go public. The initial public offerings of other exchanges logged impressive returns earlier this decade, and CBOE has a well-known brand, says Scott Sweet, head IPO researcher of IPO Boutique.

CBOE will test a market increasingly wary of initial public offerings because of volatile stock markets and concerns about the global economic recovery. The success of past exchange IPOs may not be enough to tempt buyers without a cheap price.