In early morning trading, Sirius Satellite ( SIRI) was the most actively traded stock on major exchanges, with a volume of some 25 million shares changing hands after the satellite radio operator posted a first-quarter loss this morning. Sirius, one of the largest operators of satellite radio networks, posted a net loss of $142 million, or 12 cents a share, slightly above analysts' expectations. In early morning trade, Sirius shares were down 21 cents, or 5.5%, to $3.59. Motorola ( MOT) was the third most active stock, behind the Nasdaq 100 Trust ( QQQ), after reporting Tuesday that its quarterly profit had tripled. Motorola reported first-quarter earnings of $609 million, or 25 cents a share, a huge gain from $169 million, or 7 cents a share, one year ago. After receiving a boost in before-the-bell trading, Motorola shares were up $2.97, or 18.3%, to $19.19 a share. Rounding out the top five were Lucent ( LU), Ford ( F) and Cisco ( CSCO). Ford Motor reported surprising first-quarter earnings, saying its net earnings more than doubled to $1.95 billion, or 94 cents a share, compared with $896 million, or 45 cents a share, a year earlier. Ford Motor also said that it was raising its earnings forecast for the year from $1.20 to $1.30 a share to $1.50 to $1.60. In early morning trading, Ford shares were up $1.28, or 9.4%, to $14.84.