It was the Dow’s biggest single-day nosedive … ever. Within minutes of opening this morning, the stock exchange dropped more than 1,000 points before bouncing back, recovering most of its initial value, then slumping again in the afternoon. This followed panicked selling across Asia and Europe amid fears of a tanking Chinese economy. The selloff continues last week’s steep Dow drop, with Chinese exchanges leading the biggest one-day plummet since 2007. As investors hope they’re seeing the bottom, Fed members must decide if they’ll ignore market swings — or keep interest rates pegged until the dust settles.