OIL MARKET MADNESS: Here's how a crucial breakdown between Russia and other major producers caused the biggest plunge in 29 years and tanked stocks

· *A weekend of oil-market chaos has dragged US stocks near bear market territory and added new risks to the coronavirus-rattled economy.*
· *Tensions in the commodity market spiked on Friday after Russia declined to join OPEC in curbing oil production in the wake of weakened demand.*
· *Saudi Arabia fired back late...