Dynamic Linkages antara Yield Surat Berharga Negara (SBN-Domestik), Indeks Harga Saham Gabungan (IHSG), Yield US Treasury Bond, SP500 dan Kurs IDR/USD-Dampak Pandemic-covid19 Dengan Pendekatan Model Vector Error Correction Model (VECM) = Dynamic Linkages Among Government Bonds Yield (SBN-Domestic), IDX Composite (IHSG), US Treasury Bond Yield, SP500 and IDR/USD Exchange Rate-Impact of Pandemic-Covid-19 by Using Vector Error Correction Model (VECM) Approach