One example of a fund that has benefited is Putnam Voyager (PVOYX), which is up 9.1% this year.
Rosenbluth said it recently had a one-third weighting to information-technology stocks, and its portfolio included such companies as business software and services leader Oracle (ORCL - Get Report), iPad and iPhone maker Apple (AAPL - Get Report), business-services conglomerate Tyco International (TYC - Get Report) and cable-services provider Comcast (CMCSA).
Also at the top is Lord Abbott Growth Opportunities Fund (LMGAX), up 8.2% this year. Among its biggest holdings are retailer Ross Stores (ROST - Get Report), business-software seller Citrix Systems (CTXS - Get Report) and medical-device company Intuitive Surgical (ISRG).
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