rtokens: " Some buyers stepped in , but the market was not very convinced .
pos: NNS CC NNS VBD IN TO WRB JJ DT JJ NN IN NNP VBD .
tokens: Traders and analysts differed as to how firm the relative recovery on Friday was .
ltokens: It 's a sudden plunge that takes its toll , " said Carlos Ponce , research director at Santander .