Stocks shifted into a higher gear Friday as the Nasdaq scored a new high. The Nasdaq popped 0.7%, while the S&P 500 beat that with a 0.9% gain. The IBD 50 led with a 1.5% surge. Volume rose on both major exchanges compared to Thursday’s pace. Friday was a quadruple witching day, which tends to inflate volume. IBD’s Market Pulse shifted to ‘uptrend resumes.’ Despite that, individual investors would be wise to be selective in their buying.