NEW YORK (AP) — GameStop’s stock is back to the races Friday, and the overall U.S. market is down again, as the saga that’s captivated and confused Wall Street ramps up the drama. GameStop shot up more than 70 percent in early trading, clawing back most of its steep loss from the day before, after Robinhood said it will allow customers to start buying some of the stock again. GameStop has been on a stupefying 1,800 percent run over the last three weeks, as it has become the battleground where swarms of smaller investors see themselves making an epic stand against the 1 percent.