Ginkgo Bioworks has become a penny stock -- and that's the least of its problems,Ginkgo Bioworks (DNA -3.95%) stock has dropped more than 10% since its latest quarterly report showing a more than 53% decline in Q1 revenue and continued net losses from its business. BTIG analyst Mark Massaro downgraded Ginkgo stock to sell, and lowered his price on this biotech penny stock to just $0.50. It closed Friday at $0.80, so that would be a 37.5% drop. Is Ginkgo stock a sell?Why rate Ginkgo stock a sell? Where shall ...