street. the dow opens at 12,580, after jumping 125 points yesterday. the s&p up 14, and the nasdaq gained 33. taking a look at overseas trading this morning. in tokyo, the nikkei was down 23 points. in hong kong, the hang seng tumbled 365. stocks bounced back tuesday, despite europe s ongoing debt crisis. signs greece may stay in the eurozone after next month s elections sparked buying on wall street, helping to push the dow and the s&p higher. but analysts warn of more market swings ahead. a downgrade of spain s credit undermined gold s safe appeal. the gold settled at $1548 an ounce. spain s downgrade took a toll on oil, which dropped about 2%, to settle at around $90 a barrel. news that home prices fell in march, but not as much as previous months stirred hopes of recovery in the struggling housing market. that report was offset by an