Why is it der Broker?

Broker ends in -er, and most nouns ending in -er are masculine: in a German dictionary, 86% of them take der.

All nouns ending in -er
Sense 1
der

Meaning

[1] Effect dealer on the stock exchange, securities dealer

[1] Effektenhändler an der Börse, Wertpapierhändler

Examples

[1] As a broker you only earn if you can also estimate risks well

[1] Als Broker verdient man nur, wenn man auch Risiken gut abschätzen kann.

Declension

1 Singular Plural
Nominativ der Broker die Broker
Genitiv des Brokers der Broker
Dativ dem Broker den Brokern
Akkusativ den Broker die Broker

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary