parallel market
noun[C]
FINANCE,STOCK MARKETukus(alsoparallel money market)anunofficialmarketforshares,currencies, etc., whichworksat the sametimeas theofficialmarket:
Theoffshorecurrencymarketcan beviewedas aparallelmoneymarket.
on the parallel marketIncreasedcontrolswouldlikelyspurmoreactivityon theparallelmarket.