We consider the local martingale $$M_t:=\int_0^t F(X_s)dB_s $$ where $F:\mathbb{R}^d\to\mathbb{R}^{d\times m} $ and $(B_t)_t$ is a m-dim. BM.
How can i calculate the quadratic variation?
I tried to calculate it using:
$[M,M]_t=(M_t)^2-2\int_0^tM_tdM_t $
How can i calculate the second integral?