Another Friday is here, and it is time to reflect on the stock market volatility that has picked up in the past couple of weeks. Investors likely are wondering which stocks may have gone on sale as stocks to buy and worrying about which stocks should be sold. 24/7 Wall St. reviews many fresh research calls each morning to find great ideas from value stocks to growth stocks to dividend stocks. We have broken out the positive analyst calls, and these are some of this Friday’s top analyst upgrades, initiations and positive analyst research calls seen from Wall Street.

AerCap Holdings N.V. (NYSE: AER) was started as Outperform at RBC Capital Markets.

Atmel Corp. (NASDAQ: ATML) was started as Overweight at Morgan Stanley.

Ford Motor Co. (NYSE: F) was raised to Buy from Hold at S&P Capital IQ late on Thursday afternoon.

JetBlue Airways Corp. (NASDAQ: JBLU) was raised to Market Perform from Underperform at Raymond James.

Pandora Media Inc. (NYSE: P) was raised to Buy from Neutral and the price target was raised all the way up to $27 from $18 (versus $19.85 close) at Goldman Sachs.

Wal-Mart Stores Inc. (NYSE: WMT) was raised to Buy from Hold at S&P Capital IQ late on Thursday afternoon after shares were weak from earnings and guidance.

Xilinx Inc. (NASDAQ: XLNX) was raised to Overweight from Equal Weight at Morgan Stanley.

UBS has made some key additions to its list of the great Dividend Ruler segment.