I downloaded the bid-ask spread from Bloomberg, but did not check how they calculate them. Is it only the ask minus bid price or is it weighted in a way?

I appreciate your help!

  • $\begingroup$ it's the ask minus bid. $\endgroup$ – mark leeds Mar 28 at 20:12

BID/ASK spread always means difference between ASK and BID price. On Bloomberg, the spread is calculated for each price source. There is no averaging.

The same is true for any other kind of spread (e.g. spread of bond yield against government curve). It is simply a difference between two numbers.

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