GREENWICH — Transportation-and-logistics giant XPO Logistics, which faces major scrutiny of its workplace conditions, reported Friday declining returns for the past quarter.

Second-quarter revenues dropped about 3 percent year over year, to $4.24 billion. Profits fell to $122 million, from $138 million a year ago. In February, the company had disclosed a $600 million hit, worth two-thirds of its transactions with a client that is widely believed to be Amazon.

Despite the decreases, the market’s response indicated that investors were still optimistic in the company’s long-term prospects. XPO shares closed at about $72, jumping 11 percent from their Thursday finish.