Shares of potbelly ( pbpb ) , a chicago-based sandwich shop that also offers salads and shakes , more than doubled from their initial trading price of $ 14 last friday .
Potbelly是一家位于芝加哥的三明治专卖店,它还提供沙拉和奶昔。
But there are two outliers : fast casual restaurant chains potbelly and noodles & company , which both saw their share prices more than double on their first days of trading .
While hype might have factored into the market debuts of bio and tech companies , potbelly and noodles got a boost for a different reason : put simply , they are consumer-facing businesses that can do what amazon can 't.