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I had this question during an interview but I can't seem to find the answer on the internet.

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    $\begingroup$ Of an Up and Out, I assume. It (vega) can switch from positive to negative, unlike a regular call. $\endgroup$ – Ivan Apr 21 '18 at 19:55
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    $\begingroup$ The next question is then "what is easier to hedge, a continuous barrier, or a barrier only at expiry?" $\endgroup$ – will Apr 24 '18 at 20:36
  • $\begingroup$ @Ivan Wouldn't a long position in options will always have positive vega? $\endgroup$ – RothNorth Jul 10 '18 at 12:23

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