Tom Lee’s positive stock market outlook has been proven right as the S&P 500 and Nasdaq-100 indexes continue to trend upwards. Lee’s successful launch of the Fundstrat Granny Shots US Large Cap ETF (GRNY) has surpassed $3 billion in assets within 11 months, thanks to his media exposure and growth strategy. However, investors should approach this asset-gathering success with caution, as the ETF’s current popularity may not be sustainable in the long term.

Read more at Yahoo Finance: Ignore the ‘Sugar High’ of Tom Lee’s GRNY ETF