By Barbara Kollmeyer, MarketWatch
MADRID (MarketWatch) — Here are some of Tuesday’s most notable stock moves.
Gainers
Shares of Joy Global Inc.
/quotes/zigman/7601800/quotes/nls/joy JOY
+1.72%
rose 2% in premarket trading. Piper Jaffray analysts reportedly upgraded their rating on the supplier of mining equipment to overweight.
Read on StreetInsider.com
Stocks insiders are buying like crazy
Studies show that stocks bought by insiders tend to beat the market. MarketWatch’s Laura Mandaro looks at five stocks that insiders are confident will rise. (Photo: Getty Images.)
Decliners
Shares of Fusion-io Inc.
/quotes/zigman/5375401/quotes/nls/fio FIO
-3.94%
fell more than 1% in premarket trading after analysts at William Blair reportedly downgraded its rating to market perform.
Read about downgrade on StreetInsider.
Top tickers trending
FIO:
Fusion-io shares were also trending on Twitter.
showmedahammer: $FIO could use a kind word from cnbc or the great WOZ to squeeze ‘em out
AnalystWire: William Blair Downgrades Fusion-io ($FIO) to Market Perform
http://stks.co/iIcM
AMZN:
Amazon.com Inc.
/quotes/zigman/63011/quotes/nls/amzn AMZN
+3.59%
grabbed some attention.
retail_guru: BRC confirms my view: UK Xmas was strong for non-food players but web stole show +18%. Grocers left out from seasonal surge $AMZN $WMT
Alex__Salomon: “@seeitmarket: New Post: “Trading Ideas”
http://stks.co/mI8S
by @Alex__Salomon Here he comes again! $AMZN $TMV $XRT $RAX $DDD $EGHT $SPY”

Reuters file photo
Graphics of the Amazon Kindle tablets, as seen during a news conference marking the launch of the devices in September 2011.
CELG:
Celgene Corp.
/quotes/zigman/69584/quotes/nls/celg CELG
+4.43%
was drawing some chatter and some analyst action on Tuesday. RBC Capital Markets upgraded the biopharma firm to outperform from sector perform, as analyst Michael Yee lifted his price target to $100 from $90.
Read: Celgene lifted to outperform, $100 target, at RBC
crosshairtrader: Bullish Ideas. $ES_F $AAPL $CRUS $NEM $NIHD $PAY $QLGC $SINA $VRTX $DVN $GS $CELG
http://stks.co/fIi9
antichartjunk: $CELG $NSM $EBAY now extended. A few to continue to watch tomorrow $AMZN $FB $RNF $CVLT $LNKD $WAC $OCN $CLGX $FAF $FET $HDB
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Barbara Kollmeyer is an editor for MarketWatch in Madrid. Follow her on Twitter @bkollmeyer.

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