Strong IPOs for Bare Escentuals and Shutterfly

Both companies saw big first-day trading gains. But analysts question whether one of the two can continue to boost profits consistently

A strong week for initial public stock offerings closed Friday with strong first-day trading gains for Silicon Valley–based online photo service Shutterfly (SFLY) and cosmetics company Bare Escentuals (BARE), as investors placed bets that the fast-growing companies can sustain profitability.

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