Plywood and shrimp did not, however, seem to guarantee a genuine revival of the Board of Trade and the Merc, and in the late 1960s a more radical departure began to be canvassed: financial futures. They could serve the same interlocked interests in hedging and speculation as agricultural futures did, but their pursuit encountered barriers that were essentially moral, like the earlier barriers to life insurance (Zelizer 1979).

Donald MacKenzie, An Engine, Not a Camera, loc. 634