Brief: Trading in Tradedoubler shares halted
May 15 (Reuters) - Tradedoubler Ab TRAD.ST :
* Trading in Tradedoubler shares halted
* Nasdaq OMX Stockholm says to provide details later on
Friday
* Swedish business daily Dagens Industri says U.S. firm
Gravity 4 to submit bid for Tradedoubler, referring to sources
Further company coverage: TRAD.ST