Morgan Stanley (MS) - Get Report President Colm Kelleher said today at a European financials conference that trading activity during the first quarter has felt "slightly better" than at the end of 2016. 

Bond trading is "doing well" while client volumes in stock trading are down across Wall Street, he added. 

Bank executives including Citigroup (C) - Get Report CFO John Gerspach and JPMorgan (JPM) - Get Report CFO Marianne Lake have also said recently that trading revenue this quarter would improve.