From Fallen London Wiki (Staging)
The 4.11 SPA was based on the "Imperfect Khaganian Coins Grind" from opportunity cycles (5-7-9-6). With the use of the Rat Market, there is an 8.7 SPA opportunity cycle (1-2-4-3-9-10-11) listed on the opportunity cycles guide. I changed the listed SPA on this guide to 6.25 as Intercept a Cablegram is simple, requires no input materials, and can be sold directly on the Upper River.