Securities analysts and money managers need to pay more attention to the themes and prices of contemporary art, and to rap lyrics, if they want to feel the undercurrents of each cycle.

FORBES: The "Orange Marilyn" and the market

But hiphop and rap were flourishing, angry lyrics being shouted out of Magnolia and St.

NPR: 'The Great Deluge': A Katrina Post-Mortem

Washington (CNN) -- Although Rage thinks Paul Ryan is just another cog in the "Machine, " that doesn't stop the Republican vice presidential hopeful from rocking out to the rap metal group's anti-establishment lyrics.

CNN: Ryan Rages Against the Machine

Even if you don't understand the lyrics, you can hear the influence of hip-hop and rap, which have become the lingua franca of Afro-Latinos, African-Americans and just about anyone under the age of 25 in the rest of the world.

NPR: The Music Of Africa, By Way Of Latin America

Take 25-year-old Alejandro Rosso, with his training in classical and jazz music and his love of timeless musicians such as Thelonious Monk and Herbie Hancock, throw in 22-year-old Jonas, who played in punk bands and was influenced by Nirvana, and you wind up with a mix of multilingual rap, swanky lounge-lizard tempos, frisky hip-hop and playful, inane lyrics.

CNN: Plastilina dancing in Mexico's mosh pit

Their mix of explicit lyrics, accordions, tubas and 12-string acoustic guitars make for an odd cross between gangsta rap and polka-esque folk music.

BBC: Narco-tourism in Mexico City