NEW YORK (AP) _ Stocks that were moving substantially or trading heavily Monday on the New York Stock Exchange and Nasdaq Stock Market.

NYSE

Ford Motor Co., down 76 cents at $15.73

Prudential Securities cut its rating to ``sell'' from ``hold,'' citing rising truck costs and flat pricing.

Sierra Pacific Resources, down $5.98 to $9.11

Shareholders punished the stock after energy regulators late last week granted just half the rate increases requested by Sierra Pacific Resources' Nevada Power Co.

Federated Department Stores Inc., down $1.54 at $39.31

Merrill Lynch cut Federated to ``neutral'' from ``strong buy.'' Federated said sales for the fourth week of March, including the Friday and Saturday of Easter weekend, were not as strong as expected.

NASDAQ

Trendwest Resorts Inc., up 97 cents at $24.99

Shares rose after Cendant Corp. confirmed plans to acquire Trendwest Resorts Inc., a time-share resort developer and operator, for 48.3 million shares and $74 million in debt assumption.

Digital River Inc., down $7.71 at $7.10

The company, which develops and hosts e-commerce Web sites, cut its first quarter and fiscal 2002 projections. It also closed a deal to buy assets of Beyond.com.

AaiPharma Inc., up $1.56 at $37.50

The Wilmington, N.C., drug development company raised its 2002 financial targets after completing its acquisition of some product lines from Eli Lilly.