Any historic finance people out there? I'm trying to determine what the abbreviated text in this chart means. It's from a 1917 magazine.

I figured out "T.T. in London" is "Telegraph Transfers in London". I think "Sov. Bnk. Buy. Rate" is "Sovereign Bank Buy Rate", though I'm not positive since there's a period after "Buy." in the original and I don't know what it would actually mean anyway. And the "Buy" in "Gold Bnk. Buy. Rt." also has the period.

"Tis." and "Mative Int." still completely elude me.

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