BOSTON (TheStreet) -- U.S. stocks were mixed on Monday as beleaguered insurer American International Group (AIG) - Get Report sold another business unit. These stocks hit 52-week highs.

3. Union Pacific

(UNP) - Get Report

rose 0.5% to $69.49, recording a high of $69.76. Shares of the railroad operator have increased 14% during the past month.

The numbers

: Fourth-quarter profit dropped 17% to $551 million, or $1.08 a share, as revenue fell 12% to $3.8 billion. Union Pacific's operating margin was little changed at 27%. The company has $1.9 billion of cash and $9.8 billion of debt.

The stock

: Union Pacific has doubled during the past year, outperforming U.S. indices. The stock trades at a price-to-projected-earnings ratio of 14, a 27% discount to the industry average. It is also cheap based on book value and cash flow.

2. Visa

(V) - Get Report

jumped 2.4% to $90.63, touching a high of $90.93 on optimism surrounding prepaid credit cards. Shares of the data processor have gained 9.1% in the past four weeks.

The numbers

: Fiscal first-quarter profit rose 33% to $763 million, or 75 cents a share, as revenue grew 13% to $2 billion. The operating margin widened from 57% to 60%. Visa holds $6.5 billion of cash, equating to a quick ratio of 2.1, and $53 million of debt.

The stock

: Visa has surged 81% during the past year, more than major U.S. benchmarks. The stock sells for a price-to-projected-earnings ratio of 19 and a price-to-book ratio of 2.8, representing 5% and 59% discounts to the industry average.

1. Cisco Systems

(CSCO) - Get Report

climbed 3.7% to $26.13, hitting a high of $26.36 as

Wedbush Securities

initiated coverage with a "buy" rating. Shares of the communications equipment maker have risen 11% during the past month.

The numbers

: Fiscal second-quarter profit rose 23% to $1.9 billion, or 32 cents a share, as revenue gained 8% to $9.8 billion. Cisco's operating margin stretched from 20% to 24%. Its balance sheet stores $40 billion of cash and $15 billion of debt.

The stock

: Cisco Systems has surged 84% in the past year, outpacing U.S. indices. The stock trades at a price-to-projected-earnings ratio of 15, a discount to the peer-group average. It is expensive based on book value, sales and cash flow.

-- Reported by Jake Lynch in Boston.