Here's how much the top Wall Street banks have earned in fees this year

JPMorgan is leading the pack when it comes to Wall Street revenues, according to Dealogic's preliminary league tables for the first 9 months of the year.

Altogether, global investment banking revenue was down 14% from the same period last year. The only area where revenues were up was in M&A - particularly in healthcare M&A.

League tables are a contentious subject on Wall Street.

Banks use them when pitching for new business, and a good ranking means serious bragging rights. But the league table-data can also be sliced up to make a bank's performance look better (by narrowing the field very narrowly, for example).

Though they're based on estimates, these tables are the broadest possible and a closely-watched indicator of who is up and who is down.

Here's how the banks stacked up this time around.