VTSI traded 1,138,500 shares during that period, from 11/14/18-3/28/19 They repurchased 643,000 shares, which represented 56% of the total trading volume.
I'd note a few things: The stock barely moved, from $4.21 to $4.33 That only about $4.5M traded in that 4.5 months is pretty pathetic That the company had to make more than half of that happens speaks to the lack of interest in this stock.
Otherwise, I think my point stands. You are free to disagree. My point remains that the company cannot manage the share price with a buyback. Period.