NEW YORK (AP) — Stocks are limping along in tentative trading early Wednesday, as a historic, worldwide rally downshifts dramatically after just a day. The S&P 500 was drifting between gains and losses, a day after packing a year’s worth of gains into Tuesday. Investors were relieved to see that the White House and Congress had agreed on a $2 trillion package to aid the economy. The muddled trading came a day after the Dow Jones Industrial averaged had its biggest percentage gain since 1933. Investors say market volatility is likely to continue both up and down until the number of new coronavirus cases peaks.