US STOCKS-Wall St stabilizes after Monday's steep declines
* Apple biggest drag on S&P 500, Nasdaq after Nikkei report
* Gilead up after hepatitis B drug found safe
* First Solar up after Goldman upgrades stock to buy
* Dow up 0.1 pct, S&P up 0.2 pct, Nasdaq down 0.2 pct (Updates to close)
By Caroline Valetkevitch
Jan 5 (Reuters) - The Dow and S&P 500 finished slightly higher on Tuesday, stabilizing after a weak start to the new year, though investor nervousness stayed high.
After weak Chinese economic data drove stocks down sharply on Monday, the People's Bank of China on Tuesday injected $20 billion into the financial system in a bid to help its markets.
A 2.5-percent drop in Apple Inc weighed on all three major indexes, while a fall in crude oil prices and a stronger dollar contributed to the year's shaky start.
Wal Mart Stores Inc shares, up 2.4 percent at $62.92, helped to lift both the Dow and S&P 500, though Monday's big selloff and renewed worries about China have contributed to caution about the year ahead. Continuación...