Top stock picks for 2020: Making money with midsize firms By: MarketWatch December 11, 2019 at 09:22 AM EST The mid-cap index has outperformed small- and large-cap indexes in the long run. Read More >> Related Stocks: Aarons Holdings Company Adtalem Global Education Inc Alphabet-A Alphabet-C Amazon.com Apple Boyd Gaming Corp Catalent Inc Ciena Corp Coherent Corp Dycom Industries Etsy Inc Facebook Interdigital Inc Ligand Pharm Liveramp Holdings Inc Mastec Inc Matador Resources Company Microsoft Ollies Bargain CS Penumbra Inc S&P Midcap 400 ETF Vanguard SLM Corp SML SPDR S&P 500 ETF Trust Solaredge Tech Sterling Bancorp World Wrestling Entertainment Wpx Energy Inc