My back-to-work morning train reads: • Sell in May and Go Away? Not This Year. The S&P 500 Just Had Its Best Month Since 2020. Don’t let sell in May’ spook you. Stocks have been on a tear. The Dow Jones Industrial Average DJIA -0.31% has risen 0.9% this past week through midday Friday, while the S&P 500 index SPX +0.29% has gained 1.3% and the Nasdaq Composite COMP +0.89% is up 1.4%. The latter two, with gains of 10% and 15%, respectively, in April, posted their best months since 2020. ( Barron’s ) •  More Americans Are Millionaires, But They Don’t Feel Rich : About 1 in 6 households nationwide has a net worth above $1 million, and, because the occasional billionaire tilts the scale, the average American family has passed that seven-figure benchmark. The disconnect between wealth on paper and felt affluence keeps widening. Says a lot about asset-price inflation, lifestyle creep, and sentiment.…