Forbes has published a hilarious article detailing the wealth of various fictional characters and Lucius Malfoy came in at #15.
Through brisk trading of Dark Arts artifacts on eBay to his stock holdings in Wal-Mart and Halliburton, Malfoy saw his fortune increase 30%, even while behind bars at Azkaban:
Much of Malfoy's gain can be attributed to surging commodities markets. The price of gold is at its highest level since 1987, up 16% since January alone. Malfoy's stores of gold galleons and silver sickles--among the purest mintings of those metals known--have appreciated significantly.
Despite these material gains, it’s clear Lucius' imprisonment has been personally painful. His wife, Narcissa, has reportedly begun making midnight visits to a "family friend," a tall, thin and greasy-haired professor at the Hogwarts School of Witchcraft and Wizardry. And Draco, Lucius' only son, disappeared this year following the murder of Hogwarts headmaster Albus Dumbledore.
Thanks to TLC and those who sent this in.