Numbers are due this week from IG Group Holdings Plc (LSE:IGG) and CMC Markets PLC (LSE:CMCX).
They follow updates from Plus500 and Saxo Bank that indicated lower levels of activity across financial markets towards the end of last year, which Plus said were due to the World Cup in Qatar, while customer income was up in the fourth quarter compared to the third.
Saxo said December was down 9% sequentially, with equity volumes falling 8% sequentially, though fouth-quarter volumes were nonetheless up 21% on the third and up 33% on the year earlier.
Analyst Ben Williams at Shore Capital noted that equities, with their relatively fat margins, were up 37% sequentially.
"We caution on reading this volume data too tightly, because spreads differ greatly between single equities at the wider end, also some equity indices, and the highly competitive major FX pairs where pricing is much tighter," the analyst said.
"The changes are however still informative and provide a sense of trading momentum. Q4 was strong."