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over-speculation
over-speculation n.
Brit. 
/ˌəʊvəspɛkjᵿˈleɪʃn/
, /ˌəʊvəspɛkjᵿˈleɪʃn/U.S. /ˌoʊvərˌspɛkjəˈleɪʃən/
/ˌoʊvərˌspɛkjəˈleɪʃən/ΚΠ
1845 Punch 4 Oct. 149/2 In spite of..gloomy predictions regarding over-speculation, the infatuated gentleman wrote two-and-twenty fresh applications for shares.
1995 Our Times July 46/2 These days, the 1920s' addiction of over-speculation and buying stocks on margin has been replaced by computer-triggered stock selling.
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